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60岁男性患者因晕厥就诊,既往有心肌炎病史,余留轻度左心室功能不全。住院前患者无常规服药。无其他明显疾病史。入院检查除心房颤动外,无明显其他异常,心电图显示慢心室率心房颤动伴完全性左束支传导阻滞。住院期间心电遥测证实数次阵发性室性心动过速(VT)。心导管及冠状动脉造影检查正常。超声心动描记术示轻度左心室功能不全(LVEF50%)。心电生理检查显示心房颤动心室率75次/min时希氏束心室间期75ms。未见自发停搏或结下4相房室阻滞。右心室心尖部周长600ms程控刺激无明显异常。周长400ms时,
60-year-old male patient due to syncope treatment, past history of myocarditis, leaving mild left ventricular dysfunction. Before hospitalization, there was no routine medication. No other obvious history of disease. Admission except for atrial fibrillation, no other obvious abnormalities, ECG showed atrial fibrillation with slow ventricular fibrillation with complete left bundle branch block. Cardiac telemetry during hospitalization confirmed several paroxysmal ventricular tachycardias (VT). Cardiac catheterization and coronary angiography were normal. Echocardiography showed mild left ventricular dysfunction (LVEF 50%). ECG electrophysiological examination showed atrial fibrillation ventricular rate 75 beats / min His bundle interventricular septum 75ms. No spontaneous arrest or 4-phase atrioventricular block. Right ventricular apical circumference 600ms no significant abnormalities in programmed stimulation. 400ms perimeter,