男性患者,59岁。二十年前,患者因风心病、二尖瓣狭窄先后两次行二尖瓣扩张分离术。术后长期服用地戈辛等药物。因心率持续增快,自1975年6月起加服心得宁,每次15毫克,日3次,服后无不良反应。但1981年3月始,服心得宁后1小时左右即感视物模糊不清,伴耳鸣,持续两小时左右缓 Male patient, 59 years old. Twenty years ago, patients had rheumatic mitral stenosis and mitral valve dilatation and dissection twice. Long-term use of geoxin and other drugs. Because of the heart rate continued to increase, since June 1975 plus experience Ning, each 15 mg, 3 times a day, after serving no adverse reactions. However, beginning in March 1981, about 1 hour after serving heart Ning vision blurred, with tinnitus, lasted about two hours