J-Wave syndromes expert consensus conference report: Emerging concepts and gaps in knowledge

Abstract

Sudden cardiac death † J wave † Brugada syndrome † Early repolarization syndrome † Cardiac arrhythmia † Ventricular fibrillation † Inherited cardiac arrhythmia syndrome The consensus conference was organized with the assistance of the Chinese Heart Rhythm Society and funded by an unrestricted educational grant from Buchang Pharmaceuticals.

J Waves for Predicting Cardiac Events in Hypertrophic Cardiomyopathy

“…and/or lateral (I, aVL, and V 6 ) leads (12). As previously reported (13), we classified J-wave morphology as a notching or slurring pattern.…”

The Early Repolarization ECG Pattern – An Update

“…Early repolarization syndrome is a term used for those patients who present ERP on the 12-lead ECG and had a previous episode of aborted sudden cardiac death or had documented malignant ventricular arrhythmias (ventricular fibrillation, polymorphic ventricular tachycardia) [2].…”

“…This is particularly true, when the ST segment has a horizontal or descending direction in the inferior and/or infero-lateral leads. The risk is even higher when the amplitude of J-wave is greater than 0.2 mV [2]. …”

“…Deviation of this point from the isoelectric line determine the presence of J-deflection (wave), which could be followed by upsloping or horizontal ST-segment elevation, determining the appearance of early repolarization ECG pattern (ERP). The ERP was first described in 1936 by Shipley and Hallaran, who studied 200 young healthy men and women and described the Jdeflection as notching of the descending part of the QRS complex [1][2][3].ERP was considered previously as a benign, "innocent", ECG phenomenon, as a distinct form of the so called J-wave syndromes (which include also the Brugada syndrome). However, in the last ten years, epidemiological and case-control studies found some forms of ERP to be predictors and risk factors for sudden cardiac death (primary ventricular fibrillation).…”

“…Deviation of this point from the isoelectric line determine the presence of J-deflection (wave), which could be followed by upsloping or horizontal ST-segment elevation, determining the appearance of early repolarization ECG pattern (ERP). The ERP was first described in 1936 by Shipley and Hallaran, who studied 200 young healthy men and women and described the Jdeflection as notching of the descending part of the QRS complex [1][2][3].…”