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Vol. 76. Issue 7.
Pages 539-547 (July 2023)
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Vol. 76. Issue 7.
Pages 539-547 (July 2023)
Original article
Epicardial adipose tissue volume is not an independent predictor of atrial fibrillation recurrence after catheter ablation
El tejido adiposo epicárdico no es un predictor independiente de recurrencia de fibrilación auricular tras ablación con catéter
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Inês Cruza,b,, Sara Lopes Fernandesc,, Sílvia O. Diaza, Francisca Saraivaa, António S. Barrosa, João Primob, Francisco Sampaioa,b, Ricardo Ladeiras-Lopesa,b, Ricardo Fontes-Carvalhoa,b,
Corresponding author
a Cardiovascular R&D Centre – UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine of the University of Porto, Porto, Portugal
b Cardiology Department, Centro Hospitalar de Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal
c Cardiology Department, Centro Hospitalar de Leiria, Leiria, Portugal
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Abstract
Introduction and objectives

Previous studies have suggested that epicardial adipose tissue (EAT) could exert a paracrine effect in the myocardium. However, few studies have assessed its role in the risk of atrial fibrillation (AF) recurrence. This study aimed to evaluate the association between EAT volume, and its attenuation, with the risk of AF recurrence after AF ablation.

Methods

A total of 350 consecutive patients who underwent AF ablation were included. The median age was 57 [IQR 48-65] years and 21% had persistent AF. Epicardial fat was quantified by multidetector computed tomography using Syngo.via Frontier-Cardiac Risk Assessment software, measuring pericardial fat volume (PATV), EAT volume, and attenuation of EAT posterior to the left atrium. AF recurrence was defined as any documented episode of AF, atrial flutter, or atrial tachycardia more than 3 months after the procedure.

Results

After a median follow-up of 34 [range, 12-57] months, 114 patients (33%) had AF recurrence. Univariable Cox regression showed that patients with an EAT volume ≥ 80mL had an increased risk of AF recurrence (HR, 1.65; 95%CI, 1.14-2.39; P=.007). However, after multivariable adjustment, EAT volume did not remain an independent predictor of AF recurrence (HR, 1.24; 95%CI, 0.83-1.87; P=.3). Similar results were observed with PATV. Patients with lower attenuation of EAT did not have a higher risk of AF recurrence (log-rank test, P=.75).

Conclusions

EAT parameters including the evaluation of EAT volume, PATV and EAT attenuation were not independent predictors of AF recurrence after catheter ablation.

Keywords:
Atrial fibrillation
Epicardial adipose tissue
Computed tomography
Catheter ablation
Abbreviations:
AF
CT
EAT
EATV
LA
PATV
Resumen
Introducción y objetivos

Estudios previos han sugerido que el tejido adiposo epicárdico (TAE) podría ejercer un efecto paracrino en el miocardio. Sin embargo, pocos estudios han evaluado su papel en el riesgo de recurrencia de la fibrilación auricular (FA). El objetivo de ese estudio fue evaluar la asociación entre el volumen de TAE y su atenuación con el riesgo de recurrencia de FA tras la ablación de FA.

Métodos

Se incluyó un total de 350 pacientes consecutivos sometidos a ablación de FA - mediana de edad 57 años [RIC 48-65], 21% FA persistente. La grasa epicárdica se cuantificó mediante tomografía computarizada multidetector utilizando el software Syngo.via Frontier-Cardiac Risk Assessment, midiendo el volumen tejido adiposo pericárdico (VTAP), el volumen de TAE y la atenuación de TAE posterior a la aurícula izquierda. La recurrencia de FA se definió como cualquier episodio documentado de FA, aleteo auricular, o taquicardia auricular más de 3 meses después del procedimiento.

Resultados

Tras una mediana de seguimiento de 34 meses [rango de 12 a 57 meses], 114 pacientes (33%) tuvieron recurrencia de FA. La regresión de Cox univariable mostró que los pacientes con un volumen de TAE ≥ 80ml tenían un mayor riesgo de recurrencia de FA (HR=1,65; IC95%, 1,14-2,39; p=0,007). Sin embargo, después del ajuste multivariable, el volumen de TAE no fue un predictor independiente de recurrencia de FA (HR=1,24; IC95%, 0,83-1,87; p=0,3). Se observaron resultados similares con VTAP. Los pacientes con menor atenuación de TAE no tenían un mayor riesgo de recurrencia de FA (prueba de rango logarítmico p=0,75).

Conclusiones

Los parámetros de TAE, incluida la evaluación del volumen de TAE, VTAP y la atenuación de TAE, no fueron predictores independientes de recurrencia de FA después de la ablación con catéter.

Palabras clave:
Fibrilación auricular
Tejido adiposo epicárdico
Tomografía computarizada
Ablación con catéter

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