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Correspondence
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Volume 331:480 August 18, 1994 Number 7
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Assessment of Cardiac Risk before Abdominal Aortic Surgery

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 by Baron, J.-F.
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To the Editor: The recent article by Baron and colleagues (March 10 issue)1 provides further evidence that Bayesian principles are essential as physicians consider the appropriate prognostic stratification of candidates for major vascular surgery. When the Journal published the first report of the value of dipyridamole-thallium imaging before such procedures, all patients in the study had a history of myocardial infarction or established angina pectoris2. The high positive predictive value of the test was dependent on the high prior probability of underlying coronary disease (90 to 100 percent).

Over the past nine years, a number of investigators have used . . . [Full Text of this Article]

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