结果：正常心室有最适搏出功，总能量和收缩末势能最低而能量效率最高。
Results: The normal ventricle had optimal stroke work, minimal total energy and end systolic potential energy with maximal energy efficiency.
随着心功能减退，总能量和收缩末势能增大而搏出功保持稳定，能量效率下降。
Following heart function deterioration, the ventricular total energy and end systolic potential energy were increased, stroke work kept stable and energy efficiency was decreased.
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