VENTILATION-PERFUSION STUDIES AND THE DIAGNOSIS OF PULMONARY-EMBOLISM - CONCISE COMMUNICATION

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  • 1 January 1980
    • journal article
    • research article
    • Vol. 21  (4) , 319-323
Abstract
Various diagnostic strategies for the assessment of pulmonary embolism were developed from scintigraphic studies and pulmonary angiography in 169 patients. Likelihood ratios for several perfusion and ventilation-perfusion patterns were obtained and Bayes'' Theorem was applied using a range of prior probabilities for pulmonary embolism. Posterior probabilities ranged from under 10% to over 90%. The former values held for patients with small perfusion defects and no ventilation study, regardless of their prior probabilities for pulmonary embolism. The latter values held for patients with average to high prior probabilities and ventilation-perfusion mismatches.

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