发现心血管类药物(如洋地黄)引起心律失常已有上百年历史.在抗心律失常药物应用于临床的几十年里,它们的致心律失常作用时有发生.20年代便发现奎尼丁可引起短暂的室速或室颤,从而引起晕厥,称为“奎尼丁晕厥”.近30年来随着大量新的抗心律失常药 Cardiovascular drugs (such as digitalis) found that arrhythmia has been a century-old anti-arrhythmic drugs used in clinical decades, their arrhythmogenic effects occur from the 20th century found that quinidine Can cause short-term ventricular tachycardia or ventricular fibrillation, which can cause syncope, known as “quinidine syncope.” With the recent 30 years, a large number of new anti-arrhythmic drugs