Radionuclide assessment of right ventricular regional wall motion abnormalities in anterior left ventricular infarction.
Because of its potential use in the detection of right ventricular myocardial infarction, we performed radionuclide ventriculography in 80 consecutive cases of electrocardiographically anterior acute MI. Regional wall motion of both ventricles was studied on amplitude-phase images. Forty-five patients (56%) showed normal right ventricular function and 35 (44%) regional right ventricular dyskinesia: 19 in the septal, 14 in the apical and 2 in the free wall region. Right ventricular septal, respectively apical asynergy were virtually always associated with asynergy in the homologous parts of the left ventricle. This could be a consequence of the proximity of these regions, or alternatively be due to a common vascular supply. Thus it remains uncertain if asynergy in these regions signifies necrosis of part of the right ventricular wall. Free wall asynergy was considered as evidence of right ventricular wall necrosis. Thus, in our study group the prevalence of right ventricular myocardial infarction in anterior left ventricular myocardial infarction was at least 2.5%.
De Geeter
F
F
Department of Nuclear Medicine, Vrije Universiteit, Brussels, Belgium.
Bossuyt
A
A
Dewit
L
L
Huyghens
L
L
Block
P
P
D000328:Adult; D000368:Aged; D005260:Female; D005583:Fourier Analysis; D006352:Heart Ventricles / Q000000981:diagnostic imaging* / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction / Q000502:physiology; D009203:Myocardial Infarction / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000503:physiopathology*; D011877:Radionuclide Imaging; D013670:Sodium Pertechnetate Tc 99m; D013318:Stroke Volume / Q000502:physiology
D013670:Sodium Pertechnetate Tc 99m