Paroxysmal Atrial Fibrillation in Cryptogenic Stroke: an Overlooked Explanation?

Area of Science:

• Neurology
• Cardiology

Background:

• Cryptogenic stroke accounts for about one-third of all ischemic strokes.
• Paroxysmal atrial fibrillation (PAF) is increasingly recognized as a potential cause of cryptogenic stroke.

Purpose of the Study:

• To explore the role of paroxysmal atrial fibrillation in cryptogenic stroke.
• To evaluate the impact of long-term cardiac monitoring in detecting PAF in cryptogenic stroke patients.

Main Methods:

• Review of recent clinical trials using long-term cardiac monitoring devices.
• Analysis of studies reporting on subclinical tachyarrhythmias detected by monitoring devices.

Main Results:

• High rates of previously undetected paroxysmal atrial fibrillation were found in cryptogenic stroke patients.
• Detection of new-onset atrial fibrillation led to changes in treatment, including increased oral anticoagulation.
• Device-detected subclinical tachyarrhythmias are associated with an increased risk of stroke and thromboembolism.

Conclusions:

• A significant relationship exists between paroxysmal atrial fibrillation episodes and cryptogenic stroke risk.
• Further research is necessary to optimize diagnostic and therapeutic approaches for cryptogenic stroke related to atrial fibrillation.