Improvement in Quality of Life via Catheter Ablation for Atrial Fibrillation in Patients Undergoing Hemodialysis Therapy.

Background: Atrial fibrillation (AF) is the most common arrhythmia in patients undergoing hemodialysis (HD); AF lowers quality of life (QoL) and increases the risk of dialysis-related complications. The present study aimed to evaluate the effectiveness of AF ablation on the QoL in patients undergoing HD. Methods: Nineteen patients undergoing HD (14 men, age 68 ± 8 years; 15 with paroxysmal AF) who underwent catheter ablation (CA) of AF were enrolled in the study. The Kidney Disease Quality of Life Short Form (KDQOL-SF) was assessed to evaluate the QoL of the HD patients at baseline and 6 months after the ablation. Ablation outcomes and procedural complications were evaluated and compared to those of 1053 consecutive non-HD patients who underwent AF ablation. Results: The KDQOL-SF of the HD patients 6 months after the ablation showed an improvement in physical functioning (54 ± 23 to 68 ± 28, P < 0.01), general health perceptions (38 ± 17 to 48 ± 15, P < 0.01), and symptoms/problems (75 ± 21 to 84 ± 13, P = 0.02), compared to baseline. For intradialytic symptoms, dyspnea during HD significantly improved after the CA in the HD patients without AF recurrence (43% to 7%, P = 0.04), whereas the atrial tachyarrhythmias and hypotension during HD remained unchanged. During the follow-up period of 17 ± 13 months after the last procedure, the incidence of being arrhythmia-free was similar (HD patients, 79% vs non-HD patients, 86%, log-rank P = 0.82). No life-threatening complications occurred in any of the patients. Conclusions: CA of AF improves QoL in patients undergoing chronic HD therapy.

Contexte: La fibrillation auriculaire (FA), la forme d'arythmie la plus fréquente chez les patients sous hémodialyse (HD), entraîne une diminution de la qualité de vie (QdV) et une augmentation des risques de complications liées à la dialyse. La présente étude visait à évaluer l'effet de l'ablation de la FA sur la QdV des patients sous HD. Méthodologie: Dix-neuf patients sous HD (âgés de 68 ± 8 ans, dont 14 étaient des hommes et 15 étaient atteints de FA paroxystique) ayant subi une ablation par cathéter de la FA ont été admis dans l'étude. Le questionnaire KDQOL-SF (Kidney Disease Quality of Life Short Form) a été utilisé pour évaluer la QdV des patients sous HD avant l'intervention et six mois après l'ablation. L'issue de l'ablation et les complications liées à l'intervention ont été évaluées et comparées à celles de 1 053 patients consécutifs n'étant pas hémodialysés et ayant subi une ablation de la FA. Résultats: La comparaison des résultats initiaux au KDQOL-SF des patients hémodialysés avec les résultats obtenus six mois après l'ablation a montré des améliorations de la fonction physique (de 54 ± 23 à 68 ± 28, p < 0,01), de la perception de l'état de santé global (de 38 ± 17 à 48 ± 15, p < 0,01), et des symptômes/problèmes de santé (de 75 ± 21 à 84 ± 13, p = 0,02). En ce qui concerne les symptômes survenant lors des séances d'HD, une amélioration significative de la dyspnée a été observée après l'ablation par cathéter chez les patients sous HD sans récurrence de la FA (de 43 % à 7 %, p = 0,04), alors qu'aucun changement n'a été constaté pour les tachyarythmies auriculaires et l'hypotension. Durant la période de suivi de 17 ± 13 mois après la dernière intervention, le nombre de patients sans arythmie était comparable dans les deux groupes (79 % chez les patients hémodialysés et 86 % chez les patients non hémodialysés, test du log-rank = 0,82). Aucun patient n'a subi de complication menaçant le pronostic vital. Conclusions: L'ablation par cathéter de la FA permet d'améliorer la QdV des patients qui subissent un traitement par HD de longue durée.

Protective Effect of Catheter Ablation of Atrial Fibrillation on the Renal Function in Patients With Hypertrophic Cardiomyopathy.

Atrial fibrillation (AF) is a common arrhythmia in patients with hypertrophic cardiomyopathy (HCM) and is associated with renal function deterioration. The protective effects of catheter ablation (CA) of AF on renal function in patients with HCM remain unsolved. From 2009 to 2020, a total of 169 consecutive patients with HCM and AF (age 70 ± 12, 87 males) were retrospectively evaluated. The estimated glomerular filtration rate (eGFR) was evaluated at the study enrollment or 1 month before the CA and reevaluated 3 and 12 months later. In the 169 patients, 63 underwent CA of AF (ablation group), and the remaining 106 did not (control group). After propensity score matching, 45 pairs were matched. The baseline eGFR was similar between the 2 groups (p = 0.83). During a mean follow-up period of 34 ± 27 months, sinus rhythm was maintained in 36 patients (80%) after 1.7 ± 0.8 ablation procedures. The eGFR significantly decreased from baseline to 3 months (p <0.01) and from baseline to 1 year (p <0.01) in the control group, whereas the eGFR in the ablation group was maintained both from baseline to 3 months (p = 0.94) and from baseline to 1 year (p = 1.00) after the CA. The change in the eGFR between baseline and 12 months was significantly smaller in the ablation group than in the control group (p <0.01). After logistic regression analysis, CA of AF was the independent predictor of an improvement of eGFR (odds ratio 2.81, 95% confidence interval 1.08 to 7.36, p = 0.04). In conclusion, CA of AF had a protective effect on renal function in patients with HCM.

Prognostic impact of newly detected atrial fibrillation in patients with hypertrophic cardiomyopathy following cardiac implantable electronic device implantation.

Atrial fibrillation (AF) is the most common arrhythmia in patients with hypertrophic cardiomyopathy (HCM). The present study aimed to investigate the incidence and prognostic impact of newly detected AF after cardiac implantable electronic device (CIED) implantation with HCM patients. Fifty-six patients (33 men, age 57 ± 17 years) with HCM who underwent CIED implantations with no previous history of AF at the time of implantation (ICD n = 46, Pacemaker n = 10) were retrospectively enrolled. During 5.7 ± 3.6 years of follow-up, AF was newly detected in 20 (36%) of 56 patients after the CIED implantation (AF group) and the rest of the patients had no newly detected AF (non-AF group). The presence of mitral regurgitation (HR 8.49; 95% CI 2.29-30.6 P < 0.01) and concomitant NYHA II-IV (HR 3.37; 95% CI 1.30-8.86 P = 0.01) were the independent predictors of newly detected AF. During the follow-up, all patients in the AF group started anticoagulation mean 21 days after detection of AF, and none had a stroke during the follow-up period. The rate of appropriate ICD therapy (log-rank P = 0.95), inappropriate ICD therapy (log-rank P = 0.78), and all-cause death (log-rank P = 0.23) were similar between the two groups. However, the incidence of hospitalizations due to heart failure was higher in the AF group (55% vs. 6% log-rank P < 0.01). In conclusion, the incidence of newly detected AF after CIED implantations in HCM patients was high. The newly detected AF was associated with worsening heart failure and careful follow-up is recommended.