[Comparative studies with 4 orthogonal electrocardiographic systems of patients with right-ventricular hypertrophy].

One hundred and four patients with established mainly clinical right ventricular hypertrophy were studied (in three age subgroups, separately males and females). The predominating diseases were decompensated pulmonary heart (54 patients), mitral stenosis (45 patients). The orthogonal ECG systems of Frank, McFee , SVEC III and Akulini cev were used. The results from 40 patients were also discussed that were also with right ventricular hypertrophy but established by some other methods. The examinations of 103 healthy subjects served for comparison. The younger (mainly patients with mitral stenosis) were established to have changes in SY whereas the changes in the older were mainly in SX and QZ RZ. Consideration given to the indices--duration of SX over the norm and RX/SZ less than 1 with Akulini cev method and the duration of SY over the norm and RY/SZ less than 1, the systems of McFee and SVEC III proved to be with best diagnostic accuracy in right ventricular hypertrophy.