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DOES THE CONVERGENT ABLATION PROCEDURE AFFECT LEFT ATRIAL CONTRACTILE FUNCTION?
500 JACC March 21, 2017 Volume 69, Issue 11
Arrhythmias and Clinical EP DOES THE CONVERGENT ABLATION PROCEDURE AFFECT LEFT ATRIAL CONTRACTILE FUNCTION? Poster Contributions Poster Hall, Hall C Saturday, March 18, 2017, 3:45 p.m.-4:30 p.m. Session Title: Innovative Approaches for Reducing Risk and Improving Outcomes With Ablation Abstract Category: 8. Arrhythmias and Clinical EP: Supraventricular/Ventricular Arrhythmias Presentation Number: 1237-107 Authors: Kashif Chaudhry, Jonathan Silver, G. Muqtada Chaudhry, Bruce Hook, Matthew Reynolds, Sachin Shah, Mohammed Premjee, Lahey Hospital & Medical Center, Burlington, MA, USA Background: The Closed Chest Convergent Epicardial–Endocardial Ablation procedure uses radiofrequency energy to perform thoracoscopic epicardial ablation and percutaneous endocardial ablation. The effect of such extensive left atrial (LA) ablation on LA mechanical function is unknown.
Methods: We reviewed our registry of consecutive patients who underwent the convergent procedure at our institution. We looked at the one-year follow up echocardiograms of these patients and compared the Mitral peak A wave velocity (marker of LA contractile function) with age and sex-matched controls from our AF registry with non-paroxysmal atrial fibrillation who underwent only endocardial procedure encompassing PV isolation and additional ablation in LA, as deemed appropriate.
Results: Findings from 35 post-convergent patients and 35 control patients who maintained sinus rhythm 1 year after their index procedure are presented. The mean LA size and LV systolic function in the convergent and control groups were very similar. The mean Mitral peak A wave velocity in the convergent group was 42.8 cm/s, while that in the control group was 54.4 cm/s. The absolute difference between the two groups was 11.6 cm/s (95% CI: 2.6 to 20.7; P = 0.01). Conclusions: Our study suggests that the convergent ablation procedure does negatively affect left atrial transport function. However, reasonable LA function is still maintained.
Arrhythmias and Clinical EP DOES THE CONVERGENT ABLATION PROCEDURE AFFECT LEFT ATRIAL CONTRACTILE FUNCTION? Poster Contributions Poster Hall, Hall C Saturday, March 18, 2017, 3:45 p.m.-4:30 p.m. Session Title: Innovative Approaches for Reducing Risk and Improving Outcomes With Ablation Abstract Category: 8. Arrhythmias and Clinical EP: Supraventricular/Ventricular Arrhythmias Presentation Number: 1237-107 Authors: Kashif Chaudhry, Jonathan Silver, G. Muqtada Chaudhry, Bruce Hook, Matthew Reynolds, Sachin Shah, Mohammed Premjee, Lahey Hospital & Medical Center, Burlington, MA, USA Background: The Closed Chest Convergent Epicardial–Endocardial Ablation procedure uses radiofrequency energy to perform thoracoscopic epicardial ablation and percutaneous endocardial ablation. The effect of such extensive left atrial (LA) ablation on LA mechanical function is unknown.
Methods: We reviewed our registry of consecutive patients who underwent the convergent procedure at our institution. We looked at the one-year follow up echocardiograms of these patients and compared the Mitral peak A wave velocity (marker of LA contractile function) with age and sex-matched controls from our AF registry with non-paroxysmal atrial fibrillation who underwent only endocardial procedure encompassing PV isolation and additional ablation in LA, as deemed appropriate.
Results: Findings from 35 post-convergent patients and 35 control patients who maintained sinus rhythm 1 year after their index procedure are presented. The mean LA size and LV systolic function in the convergent and control groups were very similar. The mean Mitral peak A wave velocity in the convergent group was 42.8 cm/s, while that in the control group was 54.4 cm/s. The absolute difference between the two groups was 11.6 cm/s (95% CI: 2.6 to 20.7; P = 0.01). Conclusions: Our study suggests that the convergent ablation procedure does negatively affect left atrial transport function. However, reasonable LA function is still maintained.