Early one spring morning, a husky young surgeon ran up 20 steps to the door of the University of Pennsylvania Hospital. Suddenly he felt a stabbing pain in his chest; he broke out in a cold sweat, gasped for breath. His colleagues rushed him off to bed. A few days after this heart attack they found that a blood clot had formed in one of the chambers of his heart.
Several days after, while still very sick, the young doctor felt an "agonizing pain" in his legs; they turned cold and blue. The clot had been dislodged from his heart, had traveled...
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