例1,患者男, 83岁。因阵发性心慌、胸闷、憋气10年加重伴双下肢浮肿4天入院,诊断为冠心病,心功能不全Ⅳ级。经用利尿剂酚妥拉明、硝酸甘油、能量合剂等治疗10天,心衰纠正。即给予氨酰心安6.25mg每日2次,第7天,病人胸闷、憋气加重,心电图示Ⅱ度房室传导阻滞,立即停用氨酰 Example 1, male patient, 83 years old. Due to paroxysmal palpitation, chest tightness, suffocation 10 years aggravated with double lower extremity edema 4 days admitted, diagnosed as coronary heart disease, cardiac insufficiency Ⅳ. After treatment with diuretic phentolamine, nitroglycerin, energy mixture for 10 days, heart failure correction. That is to give atenolol 6.25mg 2 times a day, on the 7th day, the patient chest tightness, suffocating aggravated, ECG showed Ⅱ degree atrioventricular block, immediately stop the aminoacyl