VECTORCARDIOGRAMS IN DILATED CARDIOMYOPATHY AND TRIPLE VESSEL CORONARY ARTERY DISEASE: A COMPARATIVE STUDY BY VENTRICULAR GRADIENT

概要

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An analysis using vectorcardiography and left ventriculography was made on forty patients, 17 of whom had dilated cardiomyopathy (DCM), 14 with triple vessel coronary artery disease (CAD) and 9 control subjects. QRS deflection area vector A^^<⇾>qrs) was directed the most posteriorly in the DCM group and the second most posteriorly in the CAD group. Ventricular gradients (G^^<⇾>) were smaller in the DCM and CAD groups than in the control group and directed more posteriorly in the DCM group than in the CAD and control groups. G/Aqrs was the smallest in the DCM group and the second smallest in the CAD group. Aqrs-At Angle was the widest in the DCM group and the second widest in the CAD group. Left ventricular ejection fraction (EF) showed high correlations with the azimuth of A^^<⇾>qrs (r=0.659), with the magnitude of G^^<⇾> (r=0.720), with G/Aqrs (r=0.785) and with Aqrs-At Angle (r=-0.855). From this evidence, we conclude that the magnitude of G^^<⇾>, G/Aqrs and Aqrs-At Angle have definable relationship with the impairment of left ventricular function and the Aqrs-At Angle is an especially useful parameter to detect the grade of myocardial damage in both the DCM and CAD groups.
社団法人日本循環器学会の論文
1985-03-20