Drug-induced Brugada syndrome: Clinical characteristics and risk factors

Maayan Konigstein, Raphael Rosso, Guy Topaz, Pieter G. Postema, Limor Friedensohn, Karin Heller, David Zeltser, Bernard Belhassen, Arnon Adler, Sami Viskin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

Background Cardiac arrest may result from seemingly innocuous medications that do not necessarily have cardiac indications. The best-known example is the drug-induced long QT syndrome. A less known but not necessarily less important form of drug-induced proarrhythmia is the drug-induced Brugada syndrome. Objective The purpose of this study was to identify clinical and ECG risk markers for drug-induced Brugada syndrome. Methods Reports of drug-induced Brugada syndrome recounted by an international database (http://www.brugadadrugs.org) were reviewed to define characteristics that identify patients prone to developing this complication. For each patient with drug-induced Brugada syndrome who had an ECG recorded in the absence of drugs, we included 5 healthy controls matched by gender and age. All ECGs were evaluated for Brugada-like abnormalities. Results Seventy-four cases of drug-induced Brugada syndrome from noncardiac medications were identified: 77% were male, and drug toxicity was involved in 46%. Drug-induced Brugada syndrome from oral medications generally occurred weeks after the initiation of therapy. Mortality was 13%. By definition, all cases had a type I Brugada pattern during drug therapy. Nevertheless, their ECG in the absence of drugs was more frequently abnormal than the ECG of controls (56% vs 33%, P =.04). Conclusion Drug-induced Brugada syndrome from noncardiac drugs occurs predominantly in adult males, is frequently due to drug toxicity, and occurs late after the onset of therapy. Minor changes are frequently noticeable on baseline ECG, but screening is impractical because of a prohibitive false-positive rate.

Original languageEnglish
Pages (from-to)1083-1087
Number of pages5
JournalHeart Rhythm
Volume13
Issue number5
DOIs
StatePublished - 1 May 2016

Keywords

  • Brugada syndrome
  • Drugs
  • Electrocardiography
  • Heart arrest

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