Login
Search
Search
0 Dates
2025
2024
2023
2022
2021
2020
2019
2018
0 Events
CPC 2018
CPC 2019
Curso de Atualização em Medicina Cardiovascular 2019
Reunião Anual Conjunta dos Grupos de Estudo de Cirurgia Cardíaca, Doenças Valvulares e Ecocardiografia da SPC
CPC 2020
CPC 2021
CPC 2022
CPC 2023
CPC 2024
CPC 2025
0 Topics
A. Basics
B. Imaging
C. Arrhythmias and Device Therapy
D. Heart Failure
E. Coronary Artery Disease, Acute Coronary Syndromes, Acute Cardiac Care
F. Valvular, Myocardial, Pericardial, Pulmonary, Congenital Heart Disease
G. Aortic Disease, Peripheral Vascular Disease, Stroke
H. Interventional Cardiology and Cardiovascular Surgery
I. Hypertension
J. Preventive Cardiology
K. Cardiovascular Disease In Special Populations
L. Cardiovascular Pharmacology
M. Cardiovascular Nursing
N. E-Cardiology / Digital Health, Public Health, Health Economics, Research Methodology
O. Basic Science
P. Other
0 Themes
01. History of Cardiology
02. Clinical Skills
03. Imaging
04. Arrhythmias, General
05. Atrial Fibrillation
06. Supraventricular Tachycardia (non-AF)
07. Syncope and Bradycardia
08. Ventricular Arrhythmias and Sudden Cardiac Death (SCD)
09. Device Therapy
10. Chronic Heart Failure
11. Acute Heart Failure
12. Coronary Artery Disease (Chronic)
13. Acute Coronary Syndromes
14. Acute Cardiac Care
15. Valvular Heart Disease
16. Infective Endocarditis
17. Myocardial Disease
18. Pericardial Disease
19. Tumors of the Heart
20. Congenital Heart Disease and Pediatric Cardiology
21. Pulmonary Circulation, Pulmonary Embolism, Right Heart Failure
22. Aortic Disease
23. Peripheral Vascular and Cerebrovascular Disease
24. Stroke
25. Interventional Cardiology
26. Cardiovascular Surgery
27. Hypertension
28. Risk Factors and Prevention
29. Rehabilitation and Sports Cardiology
30. Cardiovascular Disease in Special Populations
31. Pharmacology and Pharmacotherapy
32. Cardiovascular Nursing
33. e-Cardiology / Digital Health
34. Public Health and Health Economics
35. Research Methodology
36. Basic Science
37. Miscellanea
0 Resources
Abstract
Slides
Vídeo
Report
CLEAR FILTERS
High-Power Ablation Guided by Ablation Index in Atrial Fibrillation: A Retrospective Study
Session:
SESSÃO DE POSTERS 41 - ABLAÇÃO DE FIBRILHAÇÃO AURICULAR
Speaker:
Oliveira Baltazar
Congress:
CPC 2025
Topic:
C. Arrhythmias and Device Therapy
Theme:
05. Atrial Fibrillation
Subtheme:
05.4 Atrial Fibrillation - Treatment
Session Type:
Cartazes
FP Number:
---
Authors:
Oliveira Baltazar; Bárbara Ferreira; Mariana Martinho; Diogo Cunha; Nazar Ilshynshy; João Luz; Sofia Almeida; Luis Brandão; Helder Pereira
Abstract
<p><strong>Introduction and Objective:</strong> Atrial fibrillation (AF) is the most common sustained arrhythmia in clinical practice and is associated with an increased risk of mortality, ischemic stroke, and decreased quality of life. Pulmonary vein isolation (PVI) via catheter ablation is a cornerstone treatment for patients with AF, aiming to create durable lesions using techniques such as contact force, ablation energy, and ablation index (AI). The AI is calculated by integrating contact force (CF), ablation energy, ablation time, and catheter stability, defining the parameter of a single ablation point. High-power ablation guided by AI for PVI appears to be a novel strategy in the treatment of AF, as demonstrated in some studies. This study aimed to evaluate the short-term efficacy and safety of high-power AI-guided ablation and to identify predictors of recurrence.</p> <p><strong>Methods:</strong> We conducted a retrospective cohort study that included 74 adult patients who underwent high-power AI-guided AF ablation (35 Watts/380 for the posterior wall; 45 Watts/500 for the anterior wall) at the Electrophysiology and Pacing Service of a tertiary hospital from January 2021 to November 2023. The procedure was performed under sedation using the CARTO® mapping system and SMARTTOUCH® NAV C ablation catheter. We analyzed the recurrence rate at 12 months and performed logistic regression to identify predictors.</p> <p><strong>Results: </strong>The mean age of the 74 patients was 61.5±8.1 years, with 55.5% (44) being male. Paroxysmal AF was the most prevalent type of arrhythmia (64.9%). After an average follow-up of 11.1±5.4 months, the cumulative recurrence rate was 27% (20 patients), with a mean time to recurrence of 7.0±6.3 months. Long-standing persistent AF was an independent predictor of recurrence (OR 10.5, 95% CI 1.52 - 72.01, p=0.01). ROC analysis revealed an area under the curve (AUC) of 0.72 (p<0.01) and identified a cut-off indexed left atrial (LA) volume of 42.5 mL/m² for AF recurrence, with a sensitivity of 67% and a specificity of 75%. No complications or deaths were recorded during the study period.</p> <p><strong>Conclusion: </strong>High-power AI-guided ablation demonstrated to be a safe and effective strategy in the treatment of atrial fibrillation, with satisfactory short-term results. These findings highlight the importance of considering recurrence predictors, such as long-standing persistent AF and left atrial volume, to improve clinical outcomes</p>
Slides
Our mission: To reduce the burden of cardiovascular disease
Visit our site