[Electrocardiographic studies in acute inferior cardiac infarct].
Studies via the orthogonal electrocardiographic systems of Frank, McFee, SVEC III and Akulinicef were carried out in 91 patients with acute inferior transnural cardiac infarctions, confirmed clinically, electrocardiographically and enzymatically (in 35 patients at necropsy). A higher number of statistically significant indices was found in males (49) as compared with females (40). McFee system indicated the highest number of pathological indices (27), whereas the rest three--almost equal number (Frank and Akulinicev--20 and SVEC III--22). The distribution of the indices in the separate axes established most frequent involvement of the axis Y by the first three systems, and in Akulinicev--most frequently--the axis X. The systems of Frank, McFee and SVEC III were established to indicate direct necrotic-lesion alterations in the axis Y, whereas the system of Akulinicev--only indirect in the axis X. The probable causes for that fact are discussed. The differentiation of inferior-lateral infarction is possible electrocardiographically with all the systems. The indices with high and exceptionally high correlation dependence are reported according to systems and sex. Sex discrepancies are present for Qy in Frank and SVEC III and for Rx--in McFee.