[Evaluation of the ejection fraction using 2 simplified echocardiographic methods in patients with ischemic heart disease and left ventricular asynergy].
This study was undertaken to assess the reliability of two simplified echocardiographic methods (Method A and B) in evaluating ejection fraction (E.F.) in patients with left ventricular wall motion abnormalities (WMA). Method A was obtained with a microprocessor that allows the superimposition of a calibrated ellipse to left ventricular end-diastolic and end-systolic silhouettes; the shape of the ellipse was modified to obtain the best superimposition of the ellipse outline to the endocardium. E.F. was then obtained with the formula: VD-VS/VD where VD and VS were the ellipse volumes at end-diastole and end-systole. In method B E.F. was obtained averaging 3 regional E.F. obtained with a longitudinal axis and 3 different transverse diameters. In a group of 40 patients with WMA and excellent 2D echo images the correlation between echocardiographic and angiographic values was r = 0.76 for method A and r = 0.92 for method B. Method B was also tested in a group of 25 consecutive unselected patients with left ventricular WMA; in this group the correlation with angiographic values of E.F. was r = 0.84.


CONCLUSIONS
in patients with WMA method B must be preferred because it is easier to perform and presents a better correlation with angiographic data than method A.
D000328:Adult; D000368:Aged; D001145:Arrhythmias, Cardiac / Q000000981:diagnostic imaging / Q000503:physiopathology*; D002302:Cardiac Output; D003327:Coronary Disease / Q000000981:diagnostic imaging / Q000503:physiopathology*; D004452:Echocardiography / Q000379:methods*; D005260:Female; D006352:Heart Ventricles / Q000000981:diagnostic imaging / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D013318:Stroke Volume
Valutazione della frazione d'eiezione mediante due metodi ecocardiografici semplificati in pazienti con cardiopatia ischemica e asinergie ventricolari sinistre.