Type of syncope and outcome in Brugada syndrome: A systematic review and meta‐analysis

Author:

Rattanawong Pattara12ORCID,Kewcharoen Jakrin3ORCID,Yinadsawaphan Thanaboon14,Fatunde Olubadewa A.1,Kanitsoraphan Chanavuth5ORCID,Vutthikraivit Wasawat6ORCID,Prasitlumkum Narut7ORCID,Chung Eugene H.8,Shen Win‐Kuang1

Affiliation:

1. Department of Cardiovascular Medicine Mayo Clinic Phoenix Arizona USA

2. Demoulas Center for Cardiac Arrhythmias, Massachusetts General Hospital Harvard Medical School Boston Massachusetts USA

3. Division of Cardiology, Cardiac Arrhythmia Service Loma Linda University Health Loma Linda California USA

4. Department of Cardiology Central Chest Institute of Thailand Nonthaburi Thailand

5. University of Hawaii Internal Medicine Residency Program Honolulu Hawaii USA

6. Division of Cardiovascular Medicine, Department of Internal Medicine University of Iowa Iowa City Iowa USA

7. Department of Cardiology University of California Riverside Riverside California USA

8. Department of Internal Medicine, Michigan Medicine University of Michigan Ann Arbor Michigan USA

Abstract

AbstractIntroductionBrugada syndrome is an inherited arrhythmic disease associated with major arrhythmic events (MAE). The importance of primary prevention of sudden cardiac death (SCD) in Brugada syndrome is well recognized; however, ventricular arrhythmia risk stratification remains challenging and controversial. We aimed to assess the association of type of syncope with MAE via systematic review and meta‐analysis.MethodsWe comprehensively searched the databases of MEDLINE and EMBASE from inception to December 2021. Included studies were cohort (prospective or retrospective) studies that reported the types of syncope (cardiac, unexplained, vasovagal, and undifferentiated) and MAE. Data from each study were combined using the random‐effects, generic inverse variance method of DerSimonian and Laird to calculate the odds ratio (OR) and 95% confidence intervals (CIs).ResultsSeventeen studies from 2005 to 2019 were included in this meta‐analysis involving 4355 Brugada syndrome patients. Overall, syncope was significantly associated with an increased risk of MAE in Brugada syndrome (OR = 3.90, 95% CI: 2.22–6.85, p < .001, I2 = 76.0%). By syncope type, cardiac (OR = 4.48, 95% CI: 2.87–7.01, p < .001, I2 = 0.0%) and unexplained (OR = 4.71, 95% CI: 1.34–16.57, p = .016, I2 = 37.3%) syncope was significantly associated with increased risk of MAE in Brugada syndrome. Vasovagal (OR = 2.90, 95% CI: 0.09–98.45, p = .554, I2 = 70.9%) and undifferentiated syncope (OR = 2.01, 95% CI: 1.00–4.03, p = .050, I2 = 64.6%, respectively) were not.ConclusionOur study demonstrated that cardiac and unexplained syncope was associated with MAE risk in Brugada syndrome populations but not in vasovagal syncope and undifferentiated syncope. Unexplained syncope is associated with a similar increased risk of MAE compared to cardiac syncope.

Publisher

Wiley

Subject

Cardiology and Cardiovascular Medicine

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