PhD Scientific Days 2026

Cardiovascular Medicine and Research 2.

Catheter Stability During Very High-Power Short-Duration Atrial Fibrillation Ablation with Continuous Compensation for Respiratory Motion

Előadó neve

Ms. Karsai, Alexandra

Neptune code

AH6PD4

Előadó munkahelye

Semmelweis University, Heart and Vascular Center

Előadó telefonszáma

+36307119319

Előadó e-mail címe

karsaialexandra99@gmail.com

Az előadás címe

Catheter Stability During Very High-Power Short-Duration Atrial Fibrillation Ablation with Continuous Compensation for Respiratory Motion

Szerző(k) neve és munkahelye

Alexandra Karsai¹, László Gellér MD PhD DSc¹, Gábor Orbán MD¹, Zoltán Salló MD¹, Klaudia Vivien Nagy MD PhD¹, István Osztheimer MD PhD¹, Péter Perge MD PhD¹, Edit Tanai MD¹, Ferenc Komlósi MD¹, Patrik Tóth MD¹, Béla Merkely MD PhD DSc¹, Nándor Szegedi MD PhD¹

1: Semmelweis University, Heart and Vascular Center

Bemutatás módja

Szóbeli

Szekció

Cardiovascular Medicine and Research 2.

Language of the presentation

English

Preferred session

Cardiovascular Medicine and Research

Összefoglaló szövege

Introduction: Among the catheter treatments for atrial fibrillation (AF), point-by-point radiofrequency Very High-Power Short-Duration (vHPSD) ablation is one of the most advanced methods for pulmonary vein isolation (PVI). A vHPSD limitation is that ablation point visualization in the CARTO™ electroanatomic mapping system is not always reliable. The latest Stability+ algorithm tracks respiratory work via continuous respiratory curve registration. Compared to previous gating methods, this may provide more accurate information on the lesion’s position, which is particularly important for the large respiratory excursions in obese patients.

Aims: We hypothesize that vHPSD ablation supported by the CARTO™3 Stability+ algorithm ensures a safe procedure and durable, recurrence-free outcomes.

Method: Our prospective study included patients undergoing de novo vHPSD PVI for paroxysmal or persistent AF. We analyzed first-pass isolation (FPI; complete electrical isolation from the rest of the left atrium immediately after the first circular ablation line) and acute reconnection (AR; conduction recurrence minutes after the ablation) rates.

Results: The study included 104 patients (30% female, mean age: 62±11 years, 73% paroxysmal AF). Procedure time was 60 [50-74] minutes, left atrial time was 41 [36-49] minutes. Successful isolation of all pulmonary veins was achieved in all patients (100%), with first-pass isolation reached in 78% of cases. Acute reconnection occurred in 10%. One minor stroke was observed. Mean follow-up is 260 days, recurrence rate is 14%. Analyzing the study population by body-mass index (BMI): first-pass isolation was 83% in the BMI<30 kg/m2 group, compared to 71% in the BMI≥30 kg/m2 group (p=0.2263). Acute reconnection was 10% in both groups. AF recurrence occurred in 11% of non-obese and 17% of obese patients (p=0.5256).

Conclusion: The application of the Stability+ algorithm achieves high rates of acute and mid-term AF freedom with a low complication rate. Obesity did not impact the procedure efficacy.

Funding: None

University

Semmelweis University

Supervisor

Nándor Szegedi MD PhD

Publication of my abstract

I do not give consent to the publication of my abstract on the website of the congress.

phd.section.field

before finishing undergraduate studies (TDK, MD-PhD)

Kind

Szabad

Status

elfogadva

Accepted presentation method

szóbeli

Előadás fájl jóváhagyás

nem hagyta jóvá

Előadó

9720

Start

11:30

End

11:40