在1例峡部顺钟向阻滞者，冠状静脉窦口刺激诱发出短阵逆钟向房扑。

Temporary counterclockwise atrial flutter was induced by pacing at coronary sinus ostium in 1 case with clockwise block in the isthmus.

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在3例峡部逆钟向阻滞者，低侧右房刺激诱发出短阵顺钟向心房扑动（简称房扑）；

Temporary clockwise atrial flutter was induced by pacing at low lateral right atrium in 3 cases with the counterclockwise block in the isthmus.

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