Serum Lactic Dehydrogenase Activity and Radioactive Lung Scanning in the Diagnosis of Pulmonary Embolism

Abstract
The serum lactic dehydrogenase (LDH) activity is an accurate and sensitive tool for the detection and diagnosis of certain life-threatening cardiovascular diseases such as myocardial infarction and pulmonary embolism (1, 2). In the case of pulmonary embolism the high mortality has led to a critical evaluation of traditional methods employed for diagnosis with the findings that they have a limited diagnostic accuracy (3, 4). In contrast, studies of the serum LDH activity have shown that a persistently elevated LDH activity appears to be a sensitive and consistent index of pulmonary embolism (5-8); however, it is not specific per se. Pulmonary

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