title: [Differential analysis of ventricular contraction using digital subtraction angiography].
abstract: One hundred and thirty-six patients with various cardiac abnormalities that had been diagnosed by standard methods, were examined by I-V DSA; images of the left and right ventricles during a representative cardiac cycle were submitted to amplitude and phase analysis, using a Fourier transformation. Temporal differentiation of ventricular function was derived from the best available right anterior oblique projection; the amplitude of cardiac movement of abnormal areas in the myocardium were obtained from a grey scale or colour coding at a fixed point. Comparison with a control group of 35 individuals showed the following pathological findings: hypokinetic segments (33 cases) showed delay, dyskinesias (20 cases) showed complete separation of maximal phases, frequently with a double peak in the phase histogram; disturbances of cardiac rhythm (14 cases) showed atypical localisation of initiation of contraction: in Wolfe-Parkinson-White syndrome this is basal-anterior, in left bundle branch block and VVI stimulation it is apical inferior; in hypertrophic obstructive cardiomyopathy (eight cases) it is postero-basal inferior with high, narrow peaks on the phase histogram. Differential phase analysis on I-V DSA enables one to define cardiac contraction in a simple manner.
mesh_terms: D000792:Angiography / Q000379:methods*; D001145:Arrhythmias, Cardiac / Q000000981:diagnostic imaging; D003327:Coronary Disease / Q000000981:diagnostic imaging; D006330:Heart Defects, Congenital / Q000000981:diagnostic imaging; D006331:Heart Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D009200:Myocardial Contraction; D013382:Subtraction Technique
vernacular_title: Differentialanalyse des Kontraktionsablaufs der Herzkammern durch digitale Subtraktionsangiographie.