M-mode echocardiography in anteroseptal myocardial infarction. Lack of sensitivity.
Eighteen patients with documented anteroseptal myocardial infarction (ASMI) were investigated with both cardiac catheterization and M-mode echocardiography. All had greater than 75% occlusion of the left anterior descending artery (LAD), proximal to the first septal perforator in 12, and distal to it in 6; 17 of 18 had abnormal septal motion by angiography. In contrast, echocardiography revealed abnormal septal motion in only 5 of 18; two others had diminished septal wall thickness in relation to posterior ventricular wall. The presence of these echocardiographic signs was not dependent either on relation of stenosis to septal perforators or on presence of septal collaterals. Although abnormal septal motion by M-mode echocardiography may indicate ASMI, normal motion does not exclude it nor does it help localize stenosis of the LAD.
D000328:Adult; D000368:Aged; D017023:Coronary Angiography; D004452:Echocardiography; D004562:Electrocardiography; D005260:Female; D006346:Heart Septum; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000175:diagnosis* / Q000000981:diagnostic imaging