Myocardial Scans and Wall Motion Studies Using Tc-99m Pyrophosphate in Suspected Acute Myocardial Infarctions

Abstract

Two different radionuclide procedures were performed on 53 patients to validate a clinical diagnosis of acute myocardial infarction (AMI). A bolus of Tc-99m pyrophosphate was injected, and on the first pass of this bolus through the heart, left ventricular wall motion studies were performed. This was followed by myocardial scintigraphy. A second wall motion study in another projection was performed after a second bolus injection. Data suggest that the combination of the scintigram and wall motion study was significantly valuable in determining the patients’ diagnoses.