[Approaches to electro- and vectorcardiographic differentiation of the signs of focal and cicatricial myocardial lesions in left-ventricular hypertrophy].

Electro- (12 and 35 ECG leads) and vectorcardiographic (3 orthogonal leads) examination of 75 patients with arterial hypertension and left-ventricular hypertrophy (LVH), 28 of which also had documented stenosis of one or more coronary arteries, was carried out using an automatic system of graphic registration and quantification of ECG-35 and VCG parameters. Electro- and vectorcardiographic signs of "pure" LVH and LVH accompanied by CHD relevant for their differential diagnosis were established. The principal singled out difference criteria include NQ (Q registration zone) and SQRSxyz (space QRS loop area), while Q (Q-wave sum), H0QRSxyz 0.08-0.10 s (QRS end vector azimuth), Gxyz (space ventricular gradient) and V0Gxyz (ventricular gradient elevation) are complementary, determined by the degree of the principal parameter shifts.