title: [Proceedings: Relaxation speed in the apex cardiogram. Comparison with criteria of myocardial function on the simultaneously registered left ventricular pressure].
abstract: A new apexcardiographic time parameter is described which is definable as the interval between the beginning of the aortic component of the second heart sound and the protodiastolic negative peak of the first derivative of the apexcardiogram and called A2-min dA/dt. There was a significant inverse correlation between the parameter in question and the simultaneous minimal and maximal rate of rise of the first derivative of left ventricular pressure in 20 patients (r = -0.79, p less than 0.001, r = -0.60, p less than 0.01 respectively).
mesh_terms: D001794:Blood Pressure; D003327:Coronary Disease / Q000175:diagnosis; D004562:Electrocardiography; D006321:Heart / Q000503:physiopathology*; D006352:Heart Ventricles; D006801:Humans; D007702:Kinetocardiography / Q000592:standards*
vernacular_title: Relaxationsgeschwindigkeit im Apexkardiogramm