model analysis indicated that sw is maximum when ea = ees , the afterload that results in the greatest efficiency is always less than that which provides the maximum sw , the sw and efficiency of a weak heart are more sensitive to changes in afterload than in a strong heart , and there is a sigmoidal relation between ventricular efficiency and end-diastolic volume that reaches its maximum at volumes outside the upper limit of the physiological range .
C0018787
heart
C0018827
ventricular