What are the main types of atrial fibrillation?

Atrial fibrillation (AF) is categorized into three main types based on the duration and nature of the episodes. The distinction is significant in both diagnosis and treatment strategies.

Paroxysmal AF refers to episodes that start suddenly and typically resolve on their own within 7 days. These episodes can recur frequently, leading to symptoms that are intermittent but often resolve without medical intervention.

Persistent AF lasts for more than seven days and requires medical intervention to terminate. Unlike paroxysmal AF, the episodes do not self-resolve within a week, which can lead to more sustained symptoms and complications.

Permanent AF is diagnosed when atrial fibrillation is continuous and the decision is made not to attempt to restore normal sinus rhythm. This type reflects a long-standing condition in which rhythm control is not pursued, either due to patient choice or clinical considerations.

The other options present various terms that do not accurately reflect the standard classifications recognized in medical literature regarding atrial fibrillation. Terms like intermittent or fleeting do not align with the established categories used to describe AF's nature accurately.