What characterizes paroxysmal atrial fibrillation?

Paroxysmal atrial fibrillation is characterized by episodes that resolve spontaneously, typically within 7 days. This definition is pivotal because paroxysmal atrial fibrillation is distinct from other forms of atrial fibrillation based on the duration and pattern of episodes. In this condition, patients experience intermittent episodes of atrial fibrillation that can start and stop suddenly, making it essential for healthcare providers to recognize the spontaneous resolution characteristic.

The episodes that last longer than 7 days or do not resolve naturally fall into a different category, specifically persistent atrial fibrillation. Additionally, while physical exertion can indeed trigger episodes of atrial fibrillation, paroxysmal atrial fibrillation does not exclusively occur only with exercise. It can arise during various situations, regardless of activity levels. Similarly, it is not limited to nocturnal occurrences; episodes can happen at any time of the day or night. Therefore, the defining attribute of paroxysmal atrial fibrillation is the spontaneous resolution of episodes within a 7-day period.