（2）抗心肌M受体抗体：抗心肌抗体的靶抗原十分复杂，可针对肌纤维、肌动蛋白、肌凝蛋白及Z带等抗原成分，因此在心肌梗死、风湿性心肌炎、病毒性心肌炎、心肌病、冠状动脉硬化性心脏病，甚至心脏手术之后，均可检出抗心肌抗体。
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