[摘 要] 目的: 通过冠状窦近端和远端起搏，比较阵发性房颤组和对照组冠状窦电图波形的改变、有效不应期的变化，探讨发生房颤的电学特征改变。方法: 39例因心律失常行导管射频消融的患者，其中17为阵发性房颤患者，对照组22例。置入10极电生理导管至冠状窦，在X线下使导管的9～10极位于冠状窦口。固定程序S1S2400/360 ms 起搏冠状窦的近端和远端，2倍的起搏阈值，记录冠状窦电图。测定远端和近端起搏局部的有效不应期。结果: 在冠 状窦电图上有双电位和碎裂电位房颤组占13/17，对照组占5/22( P <0.05)。房颤组CS1～2局部有效不应期(ERP) 明显较对照组短( P <0.05);房颤组CS9～10处ERP和对照组比较无明显差异。结论: 在房颤组冠状窦电图记录到双电位和碎裂电位，同时在冠状窦远端起搏时其ERP缩短，这些可能是房颤发生的基质。

    [关键词] 冠状窦 ; 心房颤动 ; 电生理

    Study of the electrical conduction between the left atrium and the musculature of the coronary sinus

    WANG Wei-ming，SUN Jian-hui，XU Guo-feng，SHAN Qi-jun

    (Department of Cardiology， the first Peoples′s Hospital of Changzhou， Changzhou Jiangsu 213003，China)

    [Abstract] Objective: To observe the change of CS electrigram ， the effective refractory period(ERP) at the local position of CS pacing in patients with atrial fibrillation and in control subjects during distal and proximal CS pacing. Methods: The study population consisted 39 Patients with arrhythmia under-went radio frequency catheter ablation(RFCA). These include seventeen patients with PAF and twenty-two control patients. A decapolar catheter with 2-mm interelectrode spacing every 10mm was insert into the CS ......