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Initial experience with a novel temperature-controlled radiofrequency catheter ablation for the treatment of atrial flutter
Session:
Sessão de Posters 41 - Taquiarritmias supraventriculares
Speaker:
Sofia B. Paula
Congress:
CPC 2024
Topic:
C. Arrhythmias and Device Therapy
Theme:
04. Arrhythmias, General
Subtheme:
04.6 Arrhythmias, General – Clinical
Session Type:
Cartazes
FP Number:
---
Authors:
Sofia B. Paula; Margarida Figueiredo; Ana Raquel Santos; Sofia Jacinto; Hélder Santos; André Viveiros Monteiro; Ana Lousinha; Guilherme Portugal; Bruno Valente; Paulo Osório; Pedro Silva Cunha; Mário Oliveira
Abstract
<p style="text-align:justify"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span style="color:black">Irrigated radiofrequency (RF) ablation catheters lose tissue temperature acuity, which is vital in assessing lesion formation. DIAMOND-AF (DiamondTemp™ Ablation System for the Treatment of Paroxysmal Atrial Fibrillation) was a prospective, multicenter, noninferiority, randomized trial that demonstrated non-inferiority of the new Diamond Temp Ablation (DTA) catheter (designed to re-establish accurate tissue temperature measurements during ablation) on efficacy and safety compared to contact-force RF catheters. </span><strong>Methods: </strong>Single-center prospective pilot study, evaluating patients who underwent typical atrial flutter (AFL) ablation between January and August of 2023. We considered two groups: Group 1 used a DTA system and Group 2 used a contact-force (non-DTA) catheter. Since group 1 had fewer patients, we used a propensity match score and successfully matched 30 patients in a 1:2 match. <strong>Results: </strong>We screened a total of 47 patients who underwent solely AFL ablation. Mean age was 65.5 (±7.8) years, 80.9% were male. After calculating and applying the propensity match score we had 10 patients in Group 1 and 20 patients in Group 2. Comparing baseline characteristics between Group 1 and Group 2: mean age was 66.9 vs. 70 years; 90% vs. 80% of patients were males; 70% vs. 80% had arterial systemic hypertension; 30% vs. 40% had diabetes and 20% vs. 35% had smoking habits. All patients were submitted to cavotricuspide isthmus ablation. One patient from each group was submitted to additional right atrial ablation spots. All the procedures were successful and no complications were registered. Regarding total procedure duration, Group 1 mean time was 61.9 (±24.3) min whilst Group 2 was 87.8 (±28.5) min (p=0,021). Mean fluoroscopy time in Group 1 vs. Group 2 was 3.76 (±4.23) and 1.94 (±3.15) min, respectively (P=0,3). Mean RF time in Group 1 vs. Group 2 was 7.1 (±3.51) and 9.81 (±7.72) min (P=0,5). <strong>Conclusion: </strong>The DTA system showed a similar safety profile and efficacy compared to contact force catheters in patients undergoing AFL ablation, with a shorter total procedure duration.</span></span></p>
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