Determinants of Duration and Mean Rate of Ventricular Ejection

The independent influences of stroke volume, heart rate, aortic pressure, hypothermia, sympathomimetic amines, metered mitral and aortic valvular regurgitation, and alterations in myocardial contractility on the duration and mean rate of ventricular ejection and filling were studied. These observations were made in a metabolically supported, isolated heart preparation with performance characteristics comparable to the non-isolated heart.

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