Well: Think Like a Doctor: The Man Who Wobbled

The Challenge: Can you solve the medical mystery of a man who suddenly becomes too dizzy to walk?

Every month, the Diagnosis column of The New York Times Magazine asks Well readers to try their hand at solving a medical mystery. Below you will find the story of a 56-year-old factory worker with dizziness and panic attacks. I have provided records from his two hospital visits that will give you all the information available to the doctor who finally made the diagnosis.

The first reader to offer the correct diagnosis gets a signed copy of my book, “Every Patient Tells a Story,” and the satisfaction of solving a case that stumped a roomful of specialists.

The Patient’s Story:

The middle-aged man clicked his way through the multiple reruns of late-late-night television. He should have been in bed hours ago, but lately he hadn’t been able to get to sleep. Suddenly his legs took on a life of their own. Stretched out halfway to the center of the room, they began to shake and twitch and jump around. The man watched helplessly as his legs disobeyed his mental orders to stop moving. He had no control over them. He felt nauseous, sweaty and out of breath, as if he had been running some kind of race. He called out to his wife. She hurried out of bed, took one look at him and called 911.

The Patient’s History:

By the time the man arrived at Huntsville Hospital, in Alabama, the twitching in his legs had subsided and his breathing had returned to normal. Still, he had been discharged from that same hospital for similar symptoms just two weeks earlier. They hadn’t figured out what was going on then, so they weren’t going to send him home now.

The patient considered himself pretty healthy, but the past year or so had been tough. In 2011, at the age of 54, he had had a mild stroke. He had no medical problems that put him at risk for stroke — no high blood pressure, no high cholesterol, no diabetes. A work-up at that time showed that he had a hole in his heart that allowed a tiny clot from somewhere in his body to travel to the brain and cause the stroke. He was discharged on a couple of blood thinners to keep his blood from making more clots. He hadn’t really felt completely well, though, ever since. His balance seemed a little off, and he was subject to these weird panic attacks, in which his heart would pound and he would feel short of breath whenever he got too stressed. Mostly he could manage them by just walking away and focusing on his breathing. Still, he never felt as if he was the kind of guy to panic.

And he had always been quick on his feet. The first half of his career he had been in the steel business — building huge metal trusses and supports. He and his team put together 60-plus tons of steel structures every day. For the past decade he had been machining car parts. After his stroke, work seemed to get a lot harder.

The Dizziness:

A few weeks ago, he stood up and wham — suddenly the whole world went off-kilter. He felt as if he was constantly about to fall over in a world that no longer lay down flat. His first thought was that he was having another stroke. He went straight to his doctor’s office. The doctor wasn’t sure what was going on and sent him to that same emergency room at Huntsville Hospital. After three days of testing and being evaluated by lots of specialists, his doctors still were not sure what was going on. He hadn’t had a heart attack; he hadn’t had a stroke. There was no sign of infection. All the tests they could think of were normal.

The only abnormal finding was that when he stood up, his blood pressure dropped. Why this happened wasn’t clear, but the doctors in the hospital gave him compression stockings and a pill — both could help keep his blood pressure in the normal range. Then they sent him home. He was also started on an antidepressant to help with the panic attacks he continued to have from time to time.

You can read the report from that hospital admission below.

You can also read the consultation and discharge notes from that hospital visit here.

He had been home for nearly two weeks and still he felt no better. He tried to go back to work after a week or so at home, but after driving for less than five miles, he felt he had to turn around. He wasn’t sure what was wrong; he just knew he didn’t feel right. Then his legs started jumping around, and he ended up back in the hospital.

The Doctor’s Exam:

It was nearly dawn by the time Dr. Jeremy Thompson, the first-year resident on duty that night, saw the patient. Awake but tired, the patient told his story one more time. He had been at home, watching TV, when his legs started jumping on their own and he started feeling short of breath. His wife sat at the bedside. She looked just as worried and exhausted as he did. She told the resident that when he spoke that night at home, his speech was slurred. And when the ambulance came, he could barely walk. He has never missed this much work, she told the young doctor. It’s not like him. Can’t you figure out what’s wrong?

The resident had already reviewed the records from the patient’s previous hospital admissions. He asked a few more questions: the patient had never smoked and rarely drank; his father died at age 80; his mother was still alive and well. The patient exam was normal, as were the studies done in the E.R.

The first E.R. doctor thought that his symptoms were a result of anxiety, culminating in a full-blown panic attack. The resident thought that was probably right. In any case he would discuss the case with the attending in a couple of hours during rounds on the new patients. Till then, he told the worried couple, they should just try to get a little sleep.

An Important Clue:

Dr. Robert Centor was definitely a morning person. His cheerful enthusiasm about teaching and taking care of patients made him a favorite among residents. At 7:30 that morning, he stood outside the patient’s door as Dr. Thompson relayed the somewhat frustrating case of the middle-aged man with worsening dizziness and panic attacks. Then they went into the room to meet the patient. He was a big guy, tall and muscular with the first signs of middle-aged thickening around his middle. His complexion had the look of someone who spent a lot of time outdoors. Dr. Centor introduced himself and pulled up a chair as the rest of the team watched. He asked the patient what brought him to the hospital.

“Every time I get up, I get dizzy,” the man replied. Sure, he had had some balance problems ever since his stroke, he explained, but this felt different – somehow worse. He could hardly walk, he told the doctor. He just felt too unstable.

“Can you get up and show us how you walk?” Dr. Centor asked.

“Don’t let me fall,” the patient responded. He carefully swung his legs over the side of the bed. The resident and intern stood on either side as he slowly rose. He stood with his feet far apart. When asked to close his eyes as he stood there, he wobbled and nearly fell over. When he took a few steps, his heel and toes hit the ground at the same time, making a strange slapping sound.

Seeing that, Dr. Centor knew where the problem lay and ordered a few tests to confirm his diagnosis.

You can see the review report and notes for the patient’s second hospital visit below.

Solving the Mystery:

What tests did Dr. Centor order? Do you know what is making this middle-aged man wobble? Enter your guesses below. I’ll post the answer tomorrow.

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Rules and Regulations: Post your questions and diagnosis in the Comments section below. The correct answer will appear tomorrow on Well. The winner will be contacted. Reader comments may also appear in a coming issue of The New York Times Magazine.

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European Union Agrees on Plan to Cap Banker Bonuses

BRUSSELS — Bankers in Europe face a cap on bonuses as early as next year, after an agreement on Thursday to introduce what would be the world’s strictest pay curbs in a move politicians hope will address public anger at financial-sector greed.

The provisional agreement, announced by diplomats and officials after late-night talks between E.U. member representatives and the bloc’s parliament, means bankers face an automatic cap that sets bonuses at the level of their salaries.

If a majority of a bank’s shareholders vote in favor, that ceiling can be raised to two times a banker’s pay.

“For the first time in the history of E.U. financial market regulation, we will cap bankers’ bonuses,” said Othmar Karas, the Austrian lawmaker who helped negotiate the deal.

The backing of a majority of E.U. states is needed for the deal to be finalized.

Such limits, which are set to enter E.U. law as part of a wider overhaul of capital rules to make banks safer, will be popular on a continent struggling to emerge from the ruins of a 2008 financial crisis.

But it represents a setback for the British government, which had long argued against such absolute limits. The City of London, the region’s financial capital, with 144,000 banking staff and many more in related jobs, will be hit hardest.

As it stands in draft legislation, the cap would also apply to bankers employed by an E.U. institution but based elsewhere globally, for instance in New York, according to one official, who was not authorized to speak to the media.

There are also provisions for adjusting the value of long-term non-cash payments, so more bonuses could be paid that way without breaking through the new ceiling.

Ireland, which holds the rotating E.U. presidency and negotiated what it called a “breakthrough,” will now present the agreement to E.U. countries.

Irish Finance Minister Michael Noonan said he would ask his peers to back it at an EU ministers’ meeting on March 5 in Brussels.

The change in the law is set to be introduced as part of a wider body of legislation demanding banks set aside roughly three times more capital and build up cash buffers to cover the risk of unpaid loans, for example.

Some experts have criticized the E.U., however, for failing to keep to all of the so-called Basel III code of capital standards drawn up by international regulators to reform banking after the financial crash.

The agreement on Thursday will also require banks to outline profits and other details of operations on a country-by-country basis.

A ceiling on bonuses, the only one of its kind globally, is perhaps the most radical aspect of the new rules.

Many in banking argue, however, that such reform will do little to lower pay in finance, where head-hunters say some annual packages in London approach £5 million, or about $7.6 million.

“If the cap is implemented, it could result in significantly more complex pay structures within banks as they try to fall outside the restrictions to remain competitive globally,” said Alex Beidas, a pay specialist with the law firm Linklaters.

An earlier attempt to limit bankers’ pay with an E.U. law forcing financiers to defer bonus payments for up to five years merely prompted lenders to increase base salaries. But it would be harder for banks to raise base pay this time around.

Hedge funds and private equity firms will be excluded from such curbs, although they face restrictions on pay later this year under another E.U. law.

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Pope Benedict Prepares for Final General Audience

Agence France-Presse — Getty Images

Tens of thousands of believers gathered for Pope Benedict XVI’s final general audience in St. Peter’s Square on Wednesday.

ROME — In the waning hours of his troubled papacy, Pope Benedict XVI prepared on Wednesday to hold his final general audience as tens of thousands of believers gathered in St. Peter’s Square a day before his resignation takes formal effect.

Vatican officials said around 50,000 tickets had been requested for the occasion, which is likely to draw many more pilgrims into the broad boulevard leading toward the Vatican from the River Tiber.

The pope sent shock waves around the Roman Catholic world on Feb. 11 when he announced he would resign on Thursday — the first pope to have done so voluntarily in six centuries.

The announcement left officials scrambling to deal with the protocols of his departure as he ceases to be the leader of the world’s 1.1 billion Roman Catholics. Only on Tuesday did the Vatican announce that he will keep the name Benedict XVI and will be known as the Roman pontiff emeritus or pope emeritus.

He will dress in a simple white cassock, forgoing the mozzetta, the elbow-length cape worn by some Catholic clergymen, the Vatican spokesman, the Rev. Federico Lombardi, told reporters at a news briefing on Tuesday.

And he will no longer wear the red shoes typically worn by popes, symbolizing the blood of the martyrs, Father Lombardi said, opting instead for a more quotidian brown.

Benedict’s looming departure has also triggered a surge of maneuvering among the 117 cardinals who will elect his successor in a conclave starting next month, reviving concerns about the clerical abuse scandals that dogged Benedict’s time at the Vatican.

Indeed, the abrupt resignation of the most senior Roman Catholic cardinal in Britain on Monday — after accusations that he made unwanted sexual advances toward priests years ago — showed that the taint of scandal could force a cardinal from participating in the selection of a new pope.

His exit came as at least a dozen other cardinals tarnished with accusations that they had failed to remove priests accused of sexually abusing minors were among those gathering in Rome to prepare for the conclave.

But there was no indication that the church’s promise to confront the sexual abuse scandal had led to direct pressure on those cardinals to exempt themselves from the conclave.

Rachel Donadio reported from Rome, and Alan Cowell from Paris.

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Minnesota takes down No. 1 Indiana 77-73

MINNEAPOLIS (AP) — Retaining that No. 1 national ranking has been elusive throughout this wild season in college basketball, and Indiana was the latest to lose at the top — again.

Most important and maybe more challenging for the Hoosiers, however, is holding on to first place in the tough-as-ever Big Ten.

Trevor Mbakwe had 21 points on 8-for-10 shooting and 12 rebounds to help Minnesota take down top-ranked Indiana 77-73 on Tuesday night, the seventh time the No. 1 team in the Associated Press poll has lost this season. Three of those losses were by the Hoosiers, who were No. 1 when they fell to Butler and Wisconsin earlier this season. All three opponents were unranked at the time.

Indiana (24-4, 12-3) has held the No. 1 ranking for 10 of the 17 polls by the AP this season, including the last four, and that will likely change next week. But fending off Michigan, Michigan State and Wisconsin is what's on the minds of the Hoosiers, who'll take a one-game lead in the conference race into Saturday's game against Iowa.

"Winning the Big Ten was going to be tough whether we won today or lost," said star guard Victor Oladipo, who had 16 points. "We knew it was going to be tough from the jump. Now it's even tougher. But I think my team is ready for it. We just have to go back and see what we did wrong and correct it."

Andre Hollins added 16 points for the Gophers (19-9, 7-8), who outrebounded Cody Zeller and the Hoosiers by a whopping 44-30 and solidified their slipping NCAA tournament hopes with an emphatic performance against the conference leader. The fired-up fans swarmed the court as the last seconds ticked off, the first time that's happened here since a 2002 win over Indiana.

"There were just too many times when that first shot went up and they were there before we were because we didn't get into their bodies," Hoosiers coach Tom Crean said. "We weren't physical enough on the glass. That's the bottom line."

Zeller, the second-leading shooter in the Big Ten, went 2 for 9. He had nine points with four turnovers. Minnesota had 40 points in the paint to Indiana's 22.

Mbakwe, a sixth-year senior, had a lot to do with that. While positing his conference-leading seventh double-double of the season, the 24-year-old Mbakwe was a man among boys in many ways in this game, dominating both ends of the court when the Gophers needed him most. He grabbed six of Minnesota's 23 offensive rebounds, two of them to keep a key possession alive. His off-balance put-back drew contact for a three-point play with 7:22 left that gave the Gophers a 55-52 lead.

Mbakwe was called for a loudly questioned blocking foul, his fourth, with 4:39 remaining on Zeller's fast-break layup and free throw that put the Hoosiers up 59-58. But Austin Hollins answered with a pump-fake layup that drew a foul for a three-point play and a two-point advantage for the Gophers.

The Hoosiers didn't lead again, and Joe Coleman's fast-break dunk with 2:35 left gave Minnesota a 68-61 cushion that helped it withstand a couple of 3-pointers by Christian Watford and one by Jordan Hulls in the closing minutes. That was the only basket Hulls made after halftime. He had 17 points.

"Just the way we bounced back is unbelievable. We showed that we can beat one of the best teams in the country. Now we have to build off this," said Mbakwe, whose team lost eight of its previous 11 games starting with an 88-81 loss at Indiana on Jan. 12. The Gophers were ranked eighth then. They didn't even receive a vote in the current poll. That could change next week.

The Hoosiers are still in position for their first outright Big Ten regular-season championship since 1993. With another home game against Ohio State on March 5, Indiana could still clinch the title before the finale at Michigan on March 10.

For now, though, the Hoosiers have to regroup and re-establish their inside game after the trampling in the post they endured here.

"They were relentless on the glass. We just didn't do a great job of boxing them out," Oladipo said.

___

Follow Dave Campbell on Twitter: http://www.twitter.com/DaveCampbellAP

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Well: What Housework Has to Do With Waistlines

Phys Ed

Gretchen Reynolds on the science of fitness.

One reason so many American women are overweight may be that we are vacuuming and doing laundry less often, according to a new study that, while scrupulously even-handed, is likely to stir controversy and emotions.

The study, published this month in PLoS One, is a follow-up to an influential 2011 report which used data from the U.S. Bureau of Labor Statistics to determine that, during the past 50 years, most American workers began sitting down on the job. Physical activity at work, such as walking or lifting, almost vanished, according to the data, with workers now spending most of their time seated before a computer or talking on the phone. Consequently, the authors found, the average American worker was burning almost 150 fewer calories daily at work than his or her employed parents had, a change that had materially contributed to the rise in obesity during the same time frame, especially among men, the authors concluded.

But that study, while fascinating, was narrow, focusing only on people with formal jobs. It overlooked a large segment of the population, namely a lot of women.

“Fifty years ago, a majority of women did not work outside of the home,” said Edward Archer, a research fellow with the Arnold School of Public Health at the University of South Carolina in Columbia, and lead author of the new study.

So, in collaboration with many of the authors of the earlier study of occupational physical activity, Dr. Archer set out to find data about how women had once spent their hours at home and whether and how their patterns of movement had changed over the years.

He found the information he needed in the American Heritage Time Use Study, a remarkable archive of “time-use diaries” provided by thousands of women beginning in 1965. Because Dr. Archer wished to examine how women in a variety of circumstances spent their time around the house, he gathered diaries from both working and non-employed women, starting with those in 1965 and extending through 2010.

He and his colleagues then pulled data from the diaries about how many hours the women were spending in various activities, how many calories they likely were expending in each of those tasks, and how the activities and associated energy expenditures changed over the years.

As it turned out, their findings broadly echoed those of the occupational time-use study. Women, they found, once had been quite physically active around the house, spending, in 1965, an average of 25.7 hours a week cleaning, cooking and doing laundry. Those activities, whatever their social freight, required the expenditure of considerable energy. (The authors did not include child care time in their calculations, since the women’s diary entries related to child care were inconsistent and often overlapped those of other activities.) In general at that time, working women devoted somewhat fewer hours to housework, while those not employed outside the home spent more.

Forty-five years later, in 2010, things had changed dramatically. By then, the time-use diaries showed, women were spending an average of 13.3 hours per week on housework.

More striking, the diary entries showed, women at home were now spending far more hours sitting in front of a screen. In 1965, women typically had spent about eight hours a week sitting and watching television. (Home computers weren’t invented yet.)

By 2010, those hours had more than doubled, to 16.5 hours per week. In essence, women had exchanged time spent in active pursuits, like vacuuming, for time spent being sedentary.

In the process, they had also greatly reduced the number of calories that they typically expended during their hours at home. According to the authors’ calculations, American women not employed outside the home were burning about 360 fewer calories every day in 2010 than they had in 1965, with working women burning about 132 fewer calories at home each day in 2010 than in 1965.

“Those are large reductions in energy expenditure,” Dr. Archer said, and would result, over the years, in significant weight gain without reductions in caloric intake.

What his study suggests, Dr. Archer continued, is that “we need to start finding ways to incorporate movement back into” the hours spent at home.

This does not mean, he said, that women — or men — should be doing more housework. For one thing, the effort involved is such activities today is less than it once was. Using modern, gliding vacuum cleaners is less taxing than struggling with the clunky, heavy machines once available, and thank goodness for that.

Nor is more time spent helping around the house a guarantee of more activity, over all. A telling 2012 study of television viewing habits found that when men increased the number of hours they spent on housework, they also greatly increased the hours they spent sitting in front of the TV, presumably because it was there and beckoning.

Instead, Dr. Archer said, we should start consciously tracking what we do when we are at home and try to reduce the amount of time spent sitting. “Walk to the mailbox,” he said. Chop vegetables in the kitchen. Play ball with your, or a neighbor’s, dog. Chivvy your spouse into helping you fold sheets. “The data clearly shows,” Dr. Archer said, that even at home, we need to be in motion.

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Media Decoder Blog: SFX Entertainment Buys Electronic Dance Music Site

SFX Entertainment, the company led by the media executive Robert F. X. Sillerman, has agreed to buy the music download site Beatport, part of the company’s plan to build a $1 billion empire centered on the electronic dance music craze.

Mr. Sillerman declined on Tuesday to reveal the price. But two people with direct knowledge of the transaction, who were not authorized to speak about it, said it was for a little more than $50 million.

Beatport, founded in Denver in 2004, has become the pre-eminent download store for electronic dance music, or E.D.M., with a catalog of more than one million tracks, many of them exclusive to the service. It says it has nearly 40 million users, and while the company does not disclose sales numbers, it is said to be profitable.

The site has also become an all-purpose online destination for dance music, with features like a news feed, remix contests and D.J. profiles. Those features, and its reach, could help in Mr. Sillerman’s plan to unite the disparate dance audience through media.

“Beatport gives us direct contact with the D.J.’s and lets us see what’s popular and what’s not,” Mr. Sillerman said in an interview. “Most important, it gives us a massive platform for everything related to E.D.M.”

Since the company was revived last year, SFX has focused mostly on live events, with the promoters Disco Donnie Presents and Life in Color; recently it also invested in a string of nightclubs in Miami and formed a joint venture with ID&T, the European company behind festivals like Sensation, to put on its events in North America.

In the 1990s, Mr. Sillerman spent $1.2 billion creating a nationwide network of concert promoters under the name SFX, which he sold to Clear Channel Entertainment in 2000 for $4.4 billion; those promoters are now the basis of Live Nation’s concert division.

Matthew Adell, Beatport’s chief executive, said that being part of SFX could help the company extend its business into live events, and also into countries where the dance genre is exploding, like India and Brazil.

“We already are by far the largest online destination of qualified fans and talent in the market,” Mr. Adell said, “and we can continue to grow that.”

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British Media to Challenge Secrecy Bid in Litvinenko Case

The British Broadcasting Corporation said it and other news organizations would oppose an effort on Tuesday by the British government to limit information disclosed to the planned inquest into the death of Alexander V. Litvinenko, a former officer in the KGB who died of radiation poisoning in London in 2006.

The BBC reported that the government had planned to apply for a so-called Public Interest Immunity certificate, usually issued on the grounds of national security. The case has strained ties between Britain and Russia, reviving memories of the cold war.

Mr. Litvinenko, who styled himself a whistle-blower and foe of the Kremlin, died in November, 2006, weeks after he secured British citizenship. He had fled from Russia to Britain in 2000.

Britain’s Crown Prosecution is seeking the extradition from Russia of Andrei K. Lugovoi, another former KGB officer, to face trial on murder charges. Mr. Lugovoi denies the accusation and Russia says its constitution forbids it from sending its citizens to other countries to face trial.

At a hearing in December in advance of the inquest, which is to start on May 1, Ben Emmerson, a lawyer representing Mr. Litvinenko’s widow, said that Mr. Litvinenko was a “registered and paid agent and employee of MI6, with a dedicated handler whose pseudonym was Martin.”

Mr. Litvinenko would meet his handler in central London, Mr. Emmerson said, and discuss the encounters with his wife, Marina.

Mr. Litvinenko also worked for the Spanish intelligence service, Mr. Emmerson said, and both the British and Spanish spy agencies made payments into a joint account with his wife. The lawyer added that the inquest should consider whether MI6 failed in its duty to protect him against a “real and immediate risk to life.”

The BBC said Marina Litvinenko would also oppose the British government’s effort to limit information about its knowledge of her husband his death.

Sir Robert Owen, a judge overseeing the inquest and its preparations, has said in previous hearings that he will examine what was known about threats to Mr. Litvinenko and would also seek to determine whether the Russian state bore responsibility. In a deathbed statement, Mr. Litvinenko directly blamed President Vladimir V. Putin, who dismissed the accusation.

Russian state prosecutors are expected to be represented at the inquest. Moscow has denied British suggestions that it may have been involved in killing Mr. Litvinenko, who died after ingesting polonium 210 — a rare radioactive isotope — at the Pine Bar of the Millennium Hotel in central London.

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AP source: Tom Brady gets 3-year extension

Tom Brady will be a Patriot until he is 40 years old.

Brady agreed to a three-year contract extension with New England on Monday, a person familiar with the contract told The Associated Press. The extension is worth about $27 million and will free up nearly $15 million in salary cap room for the team, which has several younger players it needs to re-sign or negotiate new deals with.

The person spoke on condition of anonymity because the extension has not been announced.

Sports Illustrated first reported the extension.

The 35-year-old two-time league MVP was signed through 2014, and has said he wants to play at least five more years.

A three-time Super Bowl champion, Brady will make far less in those three seasons than the going rate for star quarterbacks. Brady currently has a four-year, $72 million deal with $48 million guaranteed.

Drew Brees and Peyton Manning are the NFL's highest-paid quarterbacks, at an average of $20 million and $18 million a year, respectively.

Brady has made it clear he wants to finish his career with the Patriots, whom he led to Super Bowl wins for the 2001, 2003 and 2004 seasons, and losses in the big game after the 2007 and 2011 seasons. By taking less money in the extension and redoing his current contract, he's hopeful New England can surround him with the parts to win more titles.

Among the Patriots' free agents are top receiver Wes Welker and his backup, Julian Edelman; right tackle Sebastian Vollmer; cornerback Aqib Talib; and running back Danny Woodhead.

Brady has been the most successful quarterback of his era, of course, as well as one of the NFL's best leaders. His skill at running the no-huddle offense is unsurpassed, and he's easily adapted to the different offensive schemes New England has concentrated on through his 13 pro seasons.

The Patriots have gone from run-oriented in Brady's early days to a deep passing team with Randy Moss to an offense dominated by throws to tight ends, running backs and slot receivers.

Brady holds the NFL record for touchdown passes in a season with 50 in 2007, when the Patriots went 18-0 before losing the Super Bowl to the Giants. He has thrown for at least 28 touchdowns seven times and led the league three times.

Last season, Brady had 34 TD passes and eight interceptions as the Patriots went 12-4, leading the league with 557 points, 76 more than runner-up Denver.

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Horse Meat in European Beef Raises Questions on U.S. Exposure

The alarm in Europe over the discovery of horse meat in beef products escalated again Monday, when the Swedish furniture giant Ikea withdrew an estimated 1,670 pounds of meatballs from sale in 14 European countries.

Ikea acted after authorities in the Czech Republic detected horse meat in its meatballs. The company said it had made the decision even though its tests two weeks ago did not detect horse DNA.

Horse meat mixed with beef was first found last month in Ireland, then Britain, and has now expanded steadily across the Continent. The situation in Europe has created unease among American consumers over whether horse meat might also find its way into the food supply in the United States. Here are answers to commonly asked questions on the subject.

Has horse meat been found in any meatballs sold in Ikea stores in the United States?

Ikea says there is no horse meat in the meatballs it sells in the United States. The company issued a statement on Monday saying meatballs sold in its 38 stores in the United States were bought from an American supplier and contained beef and pork from animals raised in the United States and Canada.

“We do not tolerate any other ingredients than the ones stipulated in our recipes or specifications, secured through set standards, certifications and product analysis by accredited laboratories,” Ikea said in its statement.

Mona Liss, a spokeswoman for Ikea, said by e-mail that all of the businesses that supply meat to its meatball maker  issue letters guaranteeing that they will not misbrand or adulterate their products. “Additionally, as an abundance of caution, we are in the process of DNA-testing our meatballs,” Ms. Liss wrote. “Results should be concluded in 30 days.”

Does the United States import any beef from countries where horse meat has been found?

No. According to the Department of Agriculture, the United States imports no beef from any of the European countries involved in the scandal. Brian K. Mabry, a spokesman for the department’s Food Safety and Inspection Service, said: “Following a decision by Congress in November 2011 to lift the ban on horse slaughter, two establishments, one located in New Mexico and one in Missouri, have applied for a grant of inspection exclusively for equine slaughter. The Food Safety and Inspection Service (F.S.I.S.) is currently reviewing those applications.”

Has horse meat been found in ground meat products sold in the United States?

No. Meat products sold in the United States must pass Department of Agriculture inspections, whether produced domestically or imported. No government financing has been available for inspection of horse meat for human consumption in the United States since 2005, when the Humane Society of the United States got a rider forbidding financing for inspection of horse meat inserted in the annual appropriations bill for the Agriculture Department. Without inspection, such plants may not operate legally.

The rider was attached to every subsequent agriculture appropriations bill until 2011, when it was left out of an omnibus spending bill signed by President Obama on Nov. 18. The U.S.D.A.  has not committed any money for the inspection of horse meat.

“We’re real close to getting some processing plants up and running, but there are no inspectors because the U.S.D.A. is working on protocols,” said Dave Duquette, a horse trader in Oregon and president of United Horsemen, a small group that works to retrain and rehabilitate unwanted horses and advocates the slaughter of horses for meat. “We believe very strongly that the U.S.D.A. is going to bring inspectors online directly.”

Are horses slaughtered for meat for human consumption in the United States?

Not currently, although live horses from the United States are exported to slaughterhouses in Canada and Mexico. The lack of inspection effectively ended the slaughter of horse meat for human consumption in the United States; 2007 was the last year horses were slaughtered in the United States. At the time financing of inspections was banned, a Belgian company operated three horse meat processing plants — in Fort Worth and Kaufman, Tex., and DeKalb, Ill. — but exported the meat it produced in them.

Since 2011, efforts have been made to re-establish the processing of horse meat for human consumption in the United States. A small plant in Roswell, N.M., which used to process beef cattle into meat has been retooled to slaughter 20 to 25 horses a day. But legal challenges have prevented it from opening, Mr. Duquette said. Gov. Susana Martinez of New Mexico opposes opening the plant and has asked the U.S.D.A. to block it.

Last month, the two houses of the Oklahoma Legislature passed separate bills to override a law against the slaughter of horses for meat but kept the law’s ban on consumption of such meat by state residents. California, Illinois, New Jersey, Tennessee and Texas prohibit horse slaughter for human consumption.

Is there a market for horse meat in the United States?

Mr. Duquette said horse meat was popular among several growing demographic groups in the United States, including Tongans, Mongolians and various Hispanic populations. He said he knew of at least 10 restaurants that wanted to buy horse meat. “People are very polarized on this issue,” he said. Wayne Pacelle, chief executive of the Humane Society of the United States, disagreed, saying demand in the United States was limited. Italy is the largest consumer of horse meat, he said, followed by France and Belgium.

Is horse meat safe to eat?

That is a matter of much debate between proponents and opponents of horse meat consumption. Mr. Duquette said that horse meat, some derived from American animals processed abroad, was eaten widely around the world without health problems. “It’s high in protein, low in fat and has a whole lot of omega 3s,” he said.

The Humane Society says that because horse meat is not consumed in the United States, the animals’ flesh is likely to contain residues of many drugs that are unsafe for humans to eat. The organization’s list of drugs given to horses runs to 29 pages.

“We’ve been warning the Europeans about this for years,” Mr. Pacelle said. “You have all these food safety standards in Europe — they do not import chicken carcasses from the U.S. because they are bathed in chlorine, and won’t take pork because of the use of ractopamine in our industry — but you’ve thrown out the book when it comes to importing horse meat from North America.”

The society has filed petitions with the Department of Agriculture and Food and Drug Administration, arguing that they should test horse meat before allowing it to be marketed in the United States for humans to eat.

This article has been revised to reflect the following correction:

Correction: February 25, 2013

An earlier version of this article misstated how many pounds of meatballs Ikea was withdrawing from sale in 14 European countries. It is 1,670 pounds, not 1.67 billion pounds.

This article has been revised to reflect the following correction:

Correction: February 25, 2013

An earlier version of this article misstated the last year that horses were slaughtered in the United States. It is 2007, not 2006.

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DealBook: Confirmation Hearing for Mary Jo White Said to Be Scheduled for March

Mary Jo White appears poised to face a Senate confirmation hearing next month, a crucial step for the former federal prosecutor on her path to becoming the top Wall Street regulator.

Ms. White, whose nomination to lead the Securities and Exchange Commission has lingered for over a month, plans to testify in March before the Senate Banking Committee, three Congressional officials briefed on the matter said on Monday. The committee has not set a firm date for the confirmation hearing, the officials said, though lawmakers have tentatively scheduled her to appear the week of March 11.

At the hearing, one official said, Ms. White will most likely join Richard Cordray, who is in line to become director of the Consumer Financial Protection Bureau. In January, when the White House nominated Ms. White to the S.E.C. spot, it reappointed Mr. Cordray to a position he has held for the last year under a temporary recess appointment.

The Senate last year declined to confirm him in the face of Republican and Wall Street opposition to the newly created consumer bureau. Republicans are likely to voice similar skepticism at the hearing next month.

While some officials have quietly expressed concerns about Ms. White’s role as a Wall Street defense lawyer, her nomination is not expected to face major complications. An S.E.C. spokesman did not immediately respond to a request for comment.

The timetable laid out on Monday offers Ms. White additional weeks to prepare. Over the last couple of weeks, she has received multiple briefings from agency staff members about new securities rules and the structure of the stock market, an official said. The briefings will in part prepare her for the confirmation hearing, which is expected to cover a broad scope of topics.

While Ms. White is a skilled litigator, she lacks experience in financial rule-writing and regulatory minutiae, a potential stumbling block for her nomination. Lawmakers also expect to raise questions about her movements through the revolving door that bridges government service and private practice. Some Democrats, a person briefed on the matter said, will question whether she is cozy with Wall Street.

In private practice, Ms. White defended some of Wall Street’s biggest names, including Kenneth D. Lewis, a former chief of Bank of America. As the head of litigation at Debevoise & Plimpton, she also represented JPMorgan Chase and the board of Morgan Stanley. Her husband, John W. White, is co-chairman of the corporate governance practice at Cravath, Swaine & Moore, where he represents many of the companies that the S.E.C. regulates.

(Ms. White has agreed to recuse herself from many matters that involve former clients, while her husband has agreed to convert his partnership at Cravath from equity to nonequity status.)

Despite some reservations, she is expected to receive broad support on Capitol Hill. When President Obama nominated her last month, Senator Charles E. Schumer of New York was one of several Democrats to praise her prosecutorial prowess, calling her “tough as nails” during stints as a federal prosecutor in Brooklyn and as the first female United States attorney in Manhattan.

While she handled some white-collar and securities cases, her specialty was terrorism and organized crime. As a federal prosecutor in New York City for more than a decade, she helped oversee the prosecution of the crime figure John Gotti and directed the case against those responsible for the 1993 World Trade Center bombing. She also supervised the original investigation into Osama bin Laden and Al Qaeda.

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