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非接触标测识别右室流出道室速舒张期内膜触发活动和出口 |
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| 非接触标测识别右室流出道室速舒张期内膜触发活动和出口 |
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exit or the area between exit and trigger for RFCA. 【Results】 The earliest diastolic triggers were identified within the distance of (18 ± 9) mm from the exits of VT in 10 cases. The activation times of the triggers preceded the surface QRS onset by (48 ± 18) ms and the activation times of the exits preceded the surface QRS onset by (26 ± 12) ms. A line of ablation between exits and triggers was made in 5 cases， and a sheet of ablation targeted the triggers in 3 cases and the exits in 2 cases during sinus rhythm. All cases were successfully ablated. There were no complications and recurrences during (36 ± 25) months follow-up. 【Conclusions】 The diastolic endocardial triggers and exit points of RVOT VT could be identified by noncontact mapping， which is safe and effective to guide RFCA.
特发性室性心动过速(室速)最常见起源右室流出道(right ventricular outflow tract，RVOT)，其致心律失常的机制主要为cAMP介导的触发活动[1]。由于RVOT室速病灶位置局限，且体表12导联的心电图可以提供成功消融的大致位置，因此射频消融已成为根治RVOT室速的首选方法。常规消融定为依据激动标测和起搏标测，成功率约为75% ～ 100%[2]。我们已 上一页 [1] [2] [3] [4] 下一页 |
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