In the heart, action potential is moving from one heart muscle cell to another over the surface of the heart.

在心脏中，动作电位是在心脏表面从一个心肌细胞向另一个心肌细胞传递。

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For example, the lungs and the heart muscle expand less successfully, the blood vessels become increasingly rigid, and the ligaments and tendons tighten.

例如，肺部和心脏肌肉扩张不太成功，血管变得越来越僵硬，韧带和肌腱收紧。

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Twenty-five per cent of my heart muscle died.

我心肌中百分之二十五已经死亡。

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The heat burns off a small amount of heart muscle.

VOA: special.2010.03.02

Now, in the heart action potential is moving from one heart muscle cell to another over the surface of the heart.

心脏中的动作电位,沿相邻心肌细胞在心脏表面传递

耶鲁公开课 - 生物医学工程探索课程节选

It occurs because blood flow gets reduced in that blood vessel and so the heart muscle, which is actively beating all the time, needs large quantities of oxygen provided by blood can't get the blood through the vessel.

发病原因是冠状动脉血流量降低,因为心肌搏动永不停歇,随时需要血液供给大量氧气,发病时血液无法正常流过血管

耶鲁公开课 - 生物医学工程探索课程节选

He theorized that TNF and related proteins (cytokines), might be injuring the heart muscle.

FORBES: Chemical Chameleon

Many types of muscular dystrophy can also reduce the efficiency of the heart muscle.

CNN: Muscular dystrophy

Further laboratory tests showed that this defect disrupts the calcium pump in heart muscle cells.

BBC: Gene link to inherited heart disease