[Polar vectors in the posterior-inferior parietal myocardial infarct and left anterior hemiblock].

The Frank's ECG leads and the polar vectors have been quantified in 165 normal and abnormal cases. The abnormal cases were: postero-diaphragmatical infarctions, left anterior hemiblocks, postero-diaphragmatical infarctions and left anterior hemiblocks together. Our examinations were made with triaxicardiometer (TCM) analogue computer. We formed the numerical averages of the patients' groups into graphical algorithms. According to our examinated abnormal groups the X and the Y ECG derivations and the elevation angles (V degrees) of the polar vectors (triaxicardiograms) have the greatest diagnostical values.