How is paroxysmal atrial fibrillation characterized?

Paroxysmal atrial fibrillation is defined by episodes that occur intermittently and spontaneously resolve within seven days. This type of atrial fibrillation can start and stop on its own, demonstrating its transient nature. The episodes can vary in frequency and duration but always resolve within a week, which significantly differentiates it from other forms of atrial fibrillation such as persistent or permanent atrial fibrillation, where episodes may last longer or may not resolve without intervention.

Understanding the specific timeframe of seven days is crucial for distinguishing paroxysmal atrial fibrillation from other classifications. In contrast, episodes lasting longer than a week would fall under persistent atrial fibrillation. The continuous nature of an irregular heart rhythm is characteristic of permanent atrial fibrillation, which differs from the episodic nature of paroxysmal cases. While some might assume immediate medical intervention is required for all types of atrial fibrillation, paroxysmal atrial fibrillation can often resolve spontaneously without the need for emergency treatment, further emphasizing its unique classification as described.