Electrocardiographic J wave: Early repolarization, Brugada wave, and conduction delay

The J wave is a deflection between the QRS and the ST segment whose polarity is commonly in the same major direction of the QRS complex. The J wave may stand as a distinct delta wave following the QRS or be partially buried inside the QRS as QRS notching or slurring.1 –3 Since the J wave occurs at the junction that marks the completion of ventricular depolarization and beginning of ventricular repolarization, it can be part of either conduction delay or early repolarization. In other words, the J wave is simply an electrocardiographic (ECG) definition that doe s not clearly tell us whether it belongs to ventricular depolarization or repolarization.
Source: Heart Rhythm - Category: Cardiology Authors: Tags: Editorial Commentary Source Type: research