[Spatial analysis of the electrophysiological changes in ventricular loading].
Space analysis methods of the changes in heart electromotive force are described (EMF). The size of the space vector in millivolts, azimuth and elevation are obtained by formula substitution in the mathematical analysis. The same values, in graphis analysis, are obtained by the "Circle for space vectors determination", proposed by the authors. Axial and space analysis of the changes in the electrogenesis of right ventricle was performed in 27 patients with pulmonary stenosis, confirmed by catheterization, on the base of the corrective orthogonal electrocardiogram according to Frank. The axial indices, indicating the size of the forces directed to the right (Sxmv) and forward (Qzmv) are compared as well as the size, elevation and azimuth of the maximal space vector, directed to the right (Vmax.sp-x) and forward (Vmax.sp-z). The index from the axial analysis (sensitivity 62%, r = 0.65) shows a priority for the forces, directed to the right. The priority is on the side of the indices from space analysis (sensitivity 33%, r = 0.78) in case of forces directed forward. There is no statistically significant difference in the diagnostic value of the two methods.
D000328:Adult; D004594:Electrophysiology; D006352:Heart Ventricles / Q000503:physiopathology*; D006801:Humans; D008433:Mathematics; D011666:Pulmonary Valve Stenosis / Q000503:physiopathology; D014672:Vectorcardiography / Q000379:methods*
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