[The diagnostic potentials of spatial velocity ECG in assessing the changes in ventricular depolarization].

The study includes 702 patients (with left ventricular load, myocardial infarction and bundle branch block) and 130 healthy persons. To all these a spatial velocity EKG was made (SVEKG) as well as corrected orthogonal electro- and vectorcardiogram according to Frank, spatial ECG and standard EKG in 12 leads. The indices of the spatial velocity ECG were compared with those of the other methods on the basis of the criteria sensitivity and specificity. In the patients with right ventricular load the indices of the spatial electrocardiography showed the highest sensitivity; in the patients with left ventricular load and bundle branch block the indices of the corrected orthogonal electrocardiography showed the highest sensitivity. In the patients with myocardial infarction the potentials of several methods were equal. The insufficient number of investigations concerning the spatial velocity ECG cannot give a clear view of its potentials and its place in the clinical practice but some of its advantages make it very convenient for preparing a system of automatic analysis of the heart electrophysiological signal.