CHIN-FENG TSAIJING-YANG HUANG2026-10-162026-10-162021-11-01Pure ID: 15339290Pure UUID: f5ed3f62-accb-40a2-a8b6-baaeead7632410.3390/jcm10214997https://www.scopus.com/pages/publications/85117892792https://scholars.csmu.edu.tw/handle/123456789/34314A febrile state may provoke a Brugada electrocardiogram (ECG) pattern and trigger ventricular tachyarrhythmias in susceptible individuals. However, the prognostic value of fever-induced Brugada ECG pattern remains unclear. We analyzed the clinical and extended long‐term follow‐up data of consecutive febrile patients with a type 1 Brugada ECG presented to the emergency department. A total of 21 individuals (18 males; mean age, 43.7 ± 18.6 years at diagnosis) were divided into symptomatic (resuscitated cardiac arrest in one, syncope in two) and asymptomatic (18, 86%) groups. Sustained polymorphic ventricular tachycardias were inducible in two patients with previous syncope. All 18 asymptomatic patients had no spontaneous type 1 Brugada ECG recorded at second intercostal space and no family history of sudden death. Among asymptomatic individuals, 4 had a total 12 of repeated non‐arrhythmogenic febrile episodes all with recurrent type 1 Brugada ECGs, and none had a ventricular arrhythmic event during 116 ± 19 months of follow‐up. In the symptomatic group, two had defibrillator shocks for a new arrhythmic event at 31‐ and 49 months follow‐up, respectively, and one without defibrillator therapy died suddenly at 8 months follow‐up. A previous history of aborted sudden death or syncope was significantly associated with adverse outcomes in symptomatic compared with asymptomatic individuals (log‐rank p < 0.0001). In conclusion, clinical presentation or history of syncope is the most important parameter in the risk stratification of febrile patients with type 1 Brugada ECG. Asymptomatic individuals with a negative family history of sudden death and without spontaneous type 1 Brugada ECG, have an exceptionally low future risk of arrhythmic events. Careful follow‐up with timely and aggressive control of fever is an appropriate management option.enjournal article