Relationship between heart rate on atrioventricular node reentrant tachycardia sustaining and slow path position during procedure of slow path modified ablation using three-dimensional mapping system [三维标测系统下接受慢径改良消融治疗的房室结折返性心动过速患者发作时心率与慢径位置的关系]

作者：Yang Y.; Cai L.^*

来源：Chinese Journal of Interventional Imaging and Therapy, 2020, 17(6): 347-350.

DOI：10.13929/j.issn.1672-8475.2020.06.007

• Catheter ablation
• Tachycardia, atrioventricular nodal reentry
• Three-dimensional mapping system

Objective: To observe the relationship between heart rate on atrioventricular node reentrant tachycardia (AVNRT) sustaining and slow path position during procedure of slow path modified ablation using three-dimensional mapping system. Methods: Modified ablation of slow pathway under three-dimensional mapping system was performed in 98 patients with slow-fast (S-F) AVNRT confirmed by invasive electrophysiology examination. The successful target (the site of slow-pathway) and standard His bundle were marked using three-dimensional mapping system, and the distance (Distance A) between the successful target and standard His bundle was measured. The relationship between heart rate in AVNRT and Distance A was analyzed. Results: Distance A was successfully obtained in 96 patients, including 64 tachycardia induced without infusion of isoproterenol, the heart rate was (179.77±29.22)bpm and relevant Distance A was (13.56±5.06)mm, also 32 tachycardia induced with infusion of isoproterenol, the heart rate was (174.91±17.41)bpm and relevant Distance A was (12.43±3.70)mm. No obvious correlation between heart rate and slow path position was found among the above 96 patients (rs=0.048, -0.190; P=0.705, 0.298). Conclusion: There was no obvious correlation between patient's heart rate on AVNRT sustaining and slow path position druing the procedure of slow path modified ablation using three-dimensional mapping system.