What does the term “paroxysmal” refer to in the context of arrhythmias?

The term “paroxysmal” in the context of arrhythmias refers to symptoms that occur suddenly and typically resolve on their own. This definition highlights the episodic nature of paroxysmal arrhythmias, where the arrhythmia may start abruptly and can spontaneously revert to normal sinus rhythm without the need for intervention.

Paroxysmal arrhythmias, such as paroxysmal atrial fibrillation, often come and go, with episodes that may last from seconds to days. Understanding this term is crucial for recognizing the patient’s experience and the time-sensitive nature of these types of arrhythmias. It emphasizes that the events are not continuous but rather intermittent, which is different from persistent symptoms that would require ongoing management.