本试验按照随机、双盲和交叉的方式进行。对象为24例经动态心电图监测表明有隐性心肌缺血的稳定型劳力性心绞痛患者,比较阿替洛尔和硝苯啶的抗心肌缺血作用。5例服用安慰剂未按随机处理,3例服药期间未作动态心电图监测,故予剔除。其余16例分析如下。这16例的年龄63±8岁。所有患者均有冠脉病变和心绞痛史,48小时动态心电图监 The trial was conducted in a randomized, double-blind and crossover manner. The subjects were 24 patients with stable angina pectoris who had been monitored by ambulatory electrocardiogram (ECG) and had a recessive myocardial ischemia. The anti-ischemic effects of atenolol and nifedipine were compared. 5 cases were not treated with placebo randomized, 3 cases did not take during the medication ECG monitoring, it is removed. The remaining 16 cases are analyzed as follows. The 16 patients were 63 ± 8 years old. All patients had coronary artery disease and history of angina, 48-hour Holter monitoring