What is the definition of an Atrial High Rate Episode (AHRE)?
An AHRE is currently defined as an episode of at least 5 minutes of atrial tachyarrhythmia/Atrial Fibrillation (AF) with an atrial rate greater than 180 beats/min. It is usually asymptomatic and is discovered during routine cardiac implanted electrical device (CIED) follow-up. Temporal cutoffs for detection and storage of AHRE data as short as 30 to 60 seconds have been used, however the diagnostic accuracy is reliable when episodes are 5 minutes or longer in duration.