[VCG analysis of the delta wave in WPW syndrome: its relevance for localization of pre-excitation areas (author's transl)].

Electrocardiograms of 27 patients with the Wolff-Parkinson-White syndrome (12 A Rosenbaum and 15 B Rosenbaum type) were studied. Planimetrically it was determined mean polarity of the delta were on both frontal (DI and DIII bipolar leads) and horizontal (V1 and V3 precordial leads) planes. In order to identify anatomical site of pre-excitation, all data were statistically analyzed. It was allowed to distinguish 5 delta wave groups and 5 relative anatomical sites of pre-excitation: posterior paraseptal, left ventricle free wall, right ventricle free wall, left ventricle posterior wall and dorsal portion of the interventricular septum.