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目的分析房室结双径路慢径射频消融时大头局部靶图特点同出现结性心律及慢径阻断之间的关系,为消融时寻找有效的靶图提供一种客观量化的参考;方法回顾150例房室结双径路患者慢径消融的电生理资料,分析放电时靶图A、V波的宽度、振幅比值、AV非1∶1比例的特点等因素与出现结性心律及慢径阻断的相关性;结果总放电次数644次,放电出现结性心律组A波宽度为[(70.23±16.92)~(84.25±19.41)]ms,A、V波的振幅比值为(0.17±0.11)~(0.20±0.08),与未出现结性心律组相比,差异均有显著性(P<0.05)。放电时结性心律的比例越高,消融成功率越高,但也亦出现AV非1∶1传导。AV非1∶1比例的形式以V多A少为主,占89.42%,高于A多V少。结论放电时A波较宽,A、V波振幅呈现适当的比值时易出现结性心律,结性心律的数量占总心搏数量的比例越高,慢径消融的成功率越高。
OBJECTIVE: To analyze the relationship between local target features of large head radiofrequency ablation (RFLT) and the appearance of arrhythmia and slow pathway block in radiofrequency ablation of atrioventricular node dual-pathway radiofrequency, and to provide an objective and quantitative reference for finding an effective target map during ablation. 150 cases of atrioventricular node dual pathway patients with slow path ablation electrophysiological data analysis of the discharge target A, V wave width, amplitude ratio, AV non-1 ratio characteristics and other factors associated with the emergence of rhythm and slow resistance (70.23 ± 16.92) ~ (84.25 ± 19.41) ms, the amplitude ratio of A and V wave was (0.17 ± 0.11), and the amplitude of A wave was ~ (0.20 ± 0.08), respectively. There was significant difference between the two groups (P <0.05). The higher the proportion of arrhythmia during discharge, the higher the success rate of ablation, but also AV non-1: 1 conduction. AV non-1 ratio in the form of more than A less V, accounting for 89.42%, higher than A less than V. Conclusions Discharge rhythm A wave is wide, A, V wave amplitude appears the appropriate ratio prone to nodular rhythm, the proportion of the number of total rhythm of the number of total rhythm, the higher the success rate of slow-path ablation.