研究证明束支及分支内可发生Ⅰ°—Ⅱ°传导阻滞。双束支传导阻滞,其中1侧表现为文氏周期者较少见,最近我们遇到1例,报道如下。患者女性,52岁,发热伴胸闷、心悸1周于1987年4月2日入院。临床诊断:病毒性心肌炎。附图(见第171页)为入院时V_1导联记录。窦性P波规则出现,P-P间距0.62秒,心率98次/分左右。P波正负双相。PTFv_1 Studies have shown that bundle branches and branches can occur Ⅰ °-Ⅱ ° block. Bifurcation block, of which 1 side of the performance of the Wen’s cycle is less common, we recently encountered a case reported below. Patient Female, 52 years old, fever with chest tightness, palpitations 1 week admitted on April 2, 1987. Clinical diagnosis: viral myocarditis. The drawing (see page 171) is the V_1 lead record at admission. Sinus P wave rules appear, P-P pitch 0.62 seconds, heart rate 98 beats / min or so. P wave positive and negative biphasic. PTFv_1