患者,女,24岁,以病毒性心肌炎合并妊娠40周入院,准备行剖腹产,主述一年前患心肌炎,经治疗效果欠佳,经常心慌,多次查心电图均不正常,近一周心慌加重。术前查心电图为阵发性交界性心动过速伴双向性3:2不同步文氏型传导阻滞。心电图分析如下(见图)。图　阵发性交界性心动过速伴双 Patients, female, 24 years old, with viral myocarditis 40 weeks of pregnancy admitted to hospital for caesarean section, described a year ago with myocarditis, poor treatment, often palpitation, multiple check ECG are not normal, the last week increased agitation . Preoperative check ECG for paroxysmal borderline tachycardia with bidirectional 3: 2 asynchronous Venturi block. ECG analysis is as follows (see chart). Figure Paroxysmal junctional tachycardia with double