Epsilon-like waves and ventricular conduction abnormalities in subjects with type 1 ECG pattern of Brugada syndrome

Relationship Between Arrhythmogenic Right Ventricular Cardiomyopathy and Brugada Syndrome

“…Letsas et al 40 evaluated the presence of ARVC “ventricular depolarization” criteria in patients with BS, in the absence of sodium channel blockers. While epsilon waves were uncommon (6 of 47 Brugada patients), other conduction abnormalities such as a terminal QRS activation delay >55 ms were detected in 40% of cases.…”

Implantable Defibrillators in Long QT Syndrome, Brugada Syndrome, Hypertrophic Cardiomyopathy, and Arrhythmogenic Right Ventricular Cardiomyopathy

“…33 Aside from the classic findings, QT interval prolongation and QRS fragmentation along the right precordium may be present. 42,43 Signal average ECG may show late potentials in 60% to 70% of patients with Brugada. 33,40 Particularly with SCN5A mutation, patients may have depolarization abnormalities with increased P-wave duration, prolonged PR interval, and increased QRS duration.…”

Diagnostic Dilemmas: Overlapping Features of Brugada Syndrome and Arrhythmogenic Right Ventricular Cardiomyopathy

“…Thus far, Letsas et al (2011) published the only paper that described the presence of electrocardiographic ARVC criteria in Brugada syndrome patients in the absence of sodium channel blockers. Epsilon waves appear to be rare in Brugada syndrome patients and were found in 2 of 47 patients.…”

“…Epsilon waves appear to be rare in Brugada syndrome patients and were found in 2 of 47 patients. Other conduction abnormalities appear to be more common with 40% demonstrating terminal activation delay >55 ms (Letsas et al, 2011). Late potential on signal averaged ECG also appear to be common in Brugada syndrome patients and could be identified by Ikeda et al (2001) in the majority of patients despite using more restrictive cut-off values than the revised Task Force Criteria of ARVC (≥2 LP criteria vs ≥1).…”