You could, if you want, compare this to, on the one hand, a myocardial infarction, a heart attack, where you have dead tissue in the heart, versus an arrhythmia, where the organ simply isn't functioning because of the communication problems within it.
你可以这样，如果一定要比较的话， 那就想象心肌梗塞、突发性心脏病， 是由于心脏中坏死组织所致， 还有心律失常、心脏运行不正常， 是由于其内部的输导功能出了问题。