[Evaluation of regional heart function by means of local changes in pressure and direction in the vector cardiogram].
Regional function parameters under myocardial ischemia are frequently clearly changed when the parameters as the stroke volume, cardiac output, ejection fraction and the like are still unchanged by a compensation mechanism. Length changes can be measured regionally and phasically by means of a mercury wire strain gauge. The active shortening during the ejection time in relation to the total length change in this region is a possibility for the registration of the relative systolic shortening (delta LS%). Changes will be quantified still clearer and earlier if in the x-y display a vector representation of the regional displacements with the pressure in the left ventricle takes place. The plane of this vector decreased already a few seconds after the coronary occlusion. This is therefore a special early change in ischemia. The important for the estimation of therapeutic measures and other indirect measuring methods is accentuated.
D000818:Animals; D001011:Aorta; D001794:Blood Pressure; D003327:Coronary Disease / Q000503:physiopathology*; D006352:Heart Ventricles; D009200:Myocardial Contraction; D013552:Swine; D014672:Vectorcardiography
Die Beurteilung der regionalen Herzfunktion durch lokale Druck-Wegänderungen im Vektordiagramm.