Ballistocardiography in Experimental Mitral Insufficiency

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Abstract
Ten dogs were studied by right heart catheterization, ballisto-cardiograph (low-frequency, critically damped type), and measurement of O2 consumption before and after production of mitral insufficiency by a transthoracic approach. In those animals surviving 29-41 months, there was consistently a rise in right ventricular and pulmonary arterial pressures, but essentially no change in O2 consumption, arteriovenous O2 difference, cardiac output, stroke volume, or ballistocardiogram.

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