抄録
Deflection area vectors of QRS (A^^→qrs) and T (A^^→t) and ventricular gradient (G^^→) calculated from vectorcardiographic leads were compared in single vessel coronary artery diseases divided into subgroups of normokinetic, hypokinetic and akinetic by left ventriculography. In the LAD group, A^^→qrs shifted posteriorly, A^^→t were smaller and shifted to the right and G^^→ were smaller and shifted posteriorly or to the right. In the RCA group, A^^→qrs were smaller and shifted upwards, A^^→t shifted upwards and G^^→ were smaller and shifted upwards. In the LCx group, A^^→qrs shifted upwards, A^^→t shifted anteriorly and upwards and G^^→ were smaller and shifted upwards. Decreased magnitude and directional change of G^^→ reflect the severity and location of myocardial damage.
