Evaluation of cardiac pump performance and heart muscle mechanics from the apex cardiogramm. Theoretical considerations.
Theoretical grounds are outlined for assessing the pump action of the heart and myocardial mechanics, respectively, in terms of ACG displacement ventricular function curve and displacement percentage amplitude-rate of ascent curve. These displacement relationship curves compare the a% of the ACG with the ACG-derived stroke volume, on the one hand, and the isovolumetric percentage amplitudes with the rate of ascent of the slope, on the other. They indicate the expected direction changes in the ventricular function and in the force-velocity relation curves.
D001696:Biomechanical Phenomena; D002302:Cardiac Output; D006321:Heart / Q000502:physiology*; D006801:Humans; D007702:Kinetocardiography; D009200:Myocardial Contraction; D010210:Papillary Muscles / Q000502:physiology; D016276:Ventricular Function