Mitral regurgitation (MR) is classified as primary or secondary. Although this classification is an oversimplification, severe primary MR is a disease of the valve causing it to leak, placing a volume overload on the left ventricle that, if left untreated, leads to heart failure and death. In

中文翻译：

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次要MR中的疤痕，另一个难题：死肉不败。

二尖瓣关闭不全（MR）分为原发性或继发性。尽管这种分类过于简单，但严重的原发性MR是导致瓣膜渗漏的疾病，从而使左心室容积超负荷，如果不及时治疗，将导致心力衰竭和死亡。在