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Visualization of the myocardial necrotic focus with the aid of 99mTc -pyrophosphate is an informative method of determining the infarction degree and localization in the cardiac muscle. Scanning enables evaluation of the area of the necrotic focus in patients with acute myocardial infarction within two weeks of the disease onset. Scintigraphy with both the diffuse and the focal variants of isotope accumulation is shown to be of high diagnostic value in acute myocardial infarction. The specificity and sensitivity of scintigraphy are 87% and 96%, respectively.
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