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通过文章阅读学习英语六级词汇 Unit Eighteen Type-A Personality and Heart Disease If youre a classic Type A personality -- hard-driving, impatient, competitive, intense, easily irritatedyou are far more likely than a calm, laid-back Type B to suffer a heart attack, right? Wrong, says a Massachusetts General Hospital psychiatrist who has studied more than 200 heart patients awaiting disgnostic tests and found virtually no correlation between classic Type A personalities and subsequent heart disease. What does appear to be a predictor of serious heart trouble, says Dr. Joel E.Dimsdale, director of the MGH Stress Physiology Laboratory, is a chronic inability to deal constructively with anger and hostility. He is now doing a study on anger and heart disease. The original insight that people could be classified into Type A and Type B personalities and that Type As were more heart-attack prone grew out of research at the framingham Heart Study laboratories in the late 1970s. Since the early studies, the A-B issue has been getting weaker. A large prospective study last year showed the A-B behavior distinction was not associated with coronary artery disease. Now researchers are thinking in terms of anger in vs. anger out as the latest area of concern. Behavioral epidemiologist Elaine Eaker at the National Heart, Lung and Blood Institute in Bethesda, one of the nations foremost scholars of correlations between behavior and heart disease, agrees in principle. | 
