束支阻滞图形多呈右束支阻滞，因房室结转慢径路传导而恢复者有11例(73%)。

Eleven (11) cases (73%) of bundle branch block pattern returned to normal conduction when the impulses in the A-V node passed through the slow-pathway.

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心动过速可呈窄QRS图形、左束支传导阻滞（LBBB）图形及右束支传导阻滞（RBBB）图形。

The QRS complex, during tachycardia could be in morphology of narrow, left bundle branch block (LBBB) and right bundle branch block(RBBB) with VA dissociation.

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