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自从1973年Halpern等命名交替下传的文氏周期以来,国内外已屡见报道,多见于房室交界处,而发生在束支或分支内的两
Since 1973, Halpern et al. Were alternately transmitted under the Wen’s cycle, it has been reported at home and abroad, more common in the atrioventricular junction, and occurred in the branch or branch of the two