Korean Circulation Journal

  • 제52권5호
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  • Pages.368-378
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  • 2022
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  • 1738-5520(pISSN)
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  • 1738-5555(eISSN)
대한심장학회 (The Korean Society of Cardiology)
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Electrical Remodeling of Left Atrium Is a Better Predictor for Recurrence Than Structural Remodeling in Atrial Fibrillation Patients Undergoing Radiofrequency Catheter Ablation

  • Yun Gi Kim (Arrhythmia Center, Korea University Medicine Anam Hospital) ;
  • Ha Young Choi (Arrhythmia Center, Korea University Medicine Anam Hospital) ;
  • Jaemin Shim (Arrhythmia Center, Korea University Medicine Anam Hospital) ;
  • Kyongjin Min (Arrhythmia Center, Korea University Medicine Anam Hospital) ;
  • Yun Young Choi (Arrhythmia Center, Korea University Medicine Anam Hospital) ;
  • Jong-Il Choi (Arrhythmia Center, Korea University Medicine Anam Hospital) ;
  • Young-Hoon Kim (Arrhythmia Center, Korea University Medicine Anam Hospital)
  • 투고 : 2021.09.24
  • 심사 : 2021.12.01
  • 발행 : 2022.05.01
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초록

Background and Objectives: Recurrence rates after radiofrequency catheter ablation (RFCA) in atrial fibrillation (AF) patients are not low especially in non-paroxysmal AF. The diameter of left atrium (LA) has been widely used to predict the recurrence after RFCA for decades. However, LA diameter represents structural remodeling of LA and does not reflect electrical remodeling. We aimed to determine the predictive value of electrical remodeling of LA which is represented by the amount of low voltage zone (LVZ). Methods: We performed a retrospective cohort analysis of AF patients who underwent de novo RFCA in a single-center. Results: A total of 3,120 AF patients with de novo RFCA were analyzed. Among these patients, 537 patients underwent an electroanatomic mapping with bipolar voltage measurement of LA. The diameter of LA and flow velocity of LA appendage (LAA) differed significantly according to quartile group of LVZ area and percentage: patients with high LVZ had large LA diameter and low LAA flow velocity (p<0.001). Freedom from late recurrence (LR) was significantly lower in patients with high LVZ area and percentage (p<0.001). The diameter and surface area of LA had area under curve (AUC) of 0.592 and 0.593, respectively (p=0.002 for both). The predictive value of LVZ area (AUC, 0.676) and percentage (AUC, 0.671) were both superior compared with LA diameter (p=0.011 and 0.027 for each comparison). Conclusions: In conclusion, LVZ can predict freedom from LR after RFCA in AF patients. Predictive value was higher in parameters reflecting electrical rather than structural remodeling of LA.

키워드

과제정보

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (Ministry of Science and ICT; R2101281).

참고문헌

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