10～20％的冠心病监护病房的病人其MB同功酶(CK-MB)升高而肌酸激酶(CK)正常。对此看法不一,有认为虽心脏的CK-MB最丰富,但心脏肌酸激酶的同功酶仅占15％,因此CK-MB的升高均应伴有CK的升高,出现CK-MB升高而CK正常可能是人为造成的。本文对静脉应用β阻滞剂治疗的477个病人进行研究,全部病人均有不超过12小时的明显急性心肌梗塞(AMI)病史而不论其心电图是否正常;并除外凡心率<40次/分,收缩压<90mmHg,有Ⅱ度以 In 10-20% of CHD patients, their MB isoenzyme (CK-MB) was elevated and creatine kinase (CK) was normal. This different view, there is that although the heart of the most abundant CK-MB, but only 15% of cardiac creatine kinase isoenzyme, CK-MB should be accompanied by an increase in CK increased, there CK- MB elevated CK normal may be caused by man. In this study, 477 patients treated with beta-blocker intravenous therapy were studied. All patients had a history of significant acute myocardial infarction (AMI) of no more than 12 hours regardless of their normal electrocardiogram (ECG) Systolic blood pressure <90mmHg, with degree II