Objective To discuss the influence of preexcitation syndrome on frontal QRS axis and horizontal transitional zone.

目的探讨预激综合征对额面QRS电轴和横面移行区的影响.

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Methods 7 cases of ebstein anomaly with preexcitation syndrome were treated by radiofrequency catheter ablation.

方法对7例预激综合征患者行三尖瓣环处射频消融治疗.

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