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蛛网膜下腔出血（ SAH）后心脏功能异常经常发生。实验研究和临床实践发现心肌肌钙蛋白I是检测SAH后心肌损伤的良好生物学指标。肌钙蛋白I在SAH患者中的变化，对预后的指导意义及病理生理学是目前研究热点。但是，肌钙蛋白 I的临床作用存在争议，还需要大样本前瞻性的观察性研究来明确肌钙蛋白I对SAH患者预后的指导意义。“,”Cardiac abnormalities frequently occur after subarachnoid hemorrhage(SAH).Experimental studies and clinical practices have found that cardiac troponin I( cTnI) is a good biological indicator for tes-ting the cardiac injury after SAH.Currently,its variation,clinical significance and pathophysiology are the focus of studies.However its clinical function is still controversial,prospective, observational studies with sufficient sample size is still needed to assess whether cTnI has a prognostic value for SAH .