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  • Title: [Characteristics of 99m Tc-pyrophosphate images in the myocardium of aged patients].
    Author: Samoĭlenko LE, Malov AG.
    Journal: Med Radiol (Mosk); 1991; 36(4):16-8. PubMed ID: 1851923.
    Abstract:
    Myocardial scintigraphy with 99mTc-pyrophosphate is a widely used highly sensitive and specific method for the evaluation of patients with acute myocardial infarction (AMI) with optimum visualization within 24-72 h after the onset of chest pain. In some cases the so called doughnut-shaped 99mTc-pyrophosphate myocardial scintigrams may occur. As a rule patients with scintigraphic images of this type have a poor prognosis. Old-aged patients are characterized by peculiar features in the interpretation of 99mTc-pyrophosphate myocardial uptake. Findings of 4 patients aged 88 to 92 (2 patients with verified AMI and 2 CHD patients without AMI) with doughnut-shaped 99mTc-pyrophosphate myocardial scintigraphic images were analyzed. The authors present two case reports of aged patients with AMI and without it with this type of myocardial uptake and one case report of a 50-year old patient with vast anterior myocardial infarction with a poor prognosis and doughnut-shaped 99mTc-pyrophosphate myocardial scintigraphy. In old-aged patients the uptake of 99mTc-pyrophosphate in the myocardium may occur not only with but also without AMI as a result of increased calcification. These features should be taken into account while establishing correct diagnosis.
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