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Circulation, Vol 55, 88-92, Copyright © 1977 by American Heart Association

ARTICLES

Detection of left atrial myxoma by gated radionuclide cardiac imaging

GM Pohost, JO Pastore, KA McKusick, PN Chiotellis, GZ Kapellakis, GS Myers, RE Dinsmore and PC Block

Gated radionuclide cardiac blood pool scans (GCS) of end-systole and end-diastole or eight images subtending the entire cardiac cycle were performed on seven patients with left atrial myxomas documented by pulmonary cineangiography with left atrial follow-through. The ethocardiogram was either suggestive or diagnostic in all patients. In addition to demonstration of the tumor (6 patients), the GCS detected three patterns of tumor motion: 1) a defect which moved from the left atrium in end systole to the left ventricle in end diastole (2 patients); 2) a defect which remained within the region of the left atrium but decreased in size between end diastole and end systole (3); and 3) a defect which was observed within the region of the left ventricle in end diastole but disappeared in end systole (1). Thus, the GCS is a noninvasive method for detection and evaluation of motion of left atrial myxomas.

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