Apart from its sadness, Tim Russert’s death this month at 58 was deeply unsettling to many people who, like him, had been earnestly following their doctors’ advice on drugs, diet and exercise in hopes of avoiding a heart attack. Mr. Russert, the moderator of “Meet the Press” on NBC News, took blood pressure and cholesterol pills and aspirin, rode an exercise bike, had yearly stress tests and other exams and was dutifully trying to lose weight. But he died of a heart attack anyway. An article in The New York Times last week about his medical care led to e-mail...
