The virus triggered myocarditis, a serious inflammation of the heart muscle.

这些病毒引发心肌炎，对心脏肌肉造成严重的炎症。

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Kawasaki disease can also cause inflammation of the heart muscle (myocarditis) and leakiness of heart valves, but these problems are almost always temporary.

川崎氏症也可以引起心肌炎症和心瓣膜关闭不全，但这些问题几乎是一过性的。

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Injuries to the heart, including heart attacks or viral inflammation, commonly result in permanent damage or scarring of its muscle.

心脏损伤，如大面积心肌梗死或心肌病毒感染，会导致永久的心脏损害或心肌瘢痕。

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Among them are hypertrophic cardiomyopathy (HCM) - a hereditary condition in which there is excessive thickening in the heart muscle, myocarditis, which leads to inflammation of the heart muscle and coronary artery disease.

BBC: NEWS | Health | A matter of young life and death