[Implantable loop recorders for prolonged heart-rhythm monitoring in patients with cryptogenic stroke]

Area of Science:

• Cardiology
• Neurology
• Medical Devices

Background:

• Cardiac embolism, often following stroke or transient ischemic attack, poses a significant risk.
• Atrial fibrillation (AF) is a common cause of cardioembolic stroke.
• Early detection of AF is crucial for preventing recurrent cerebrovascular events.

Purpose of the Study:

• To evaluate the efficacy of implantable loop recorders (ILR) for the timely diagnosis of atrial fibrillation (AF) in patients with a history of cardiac embolism.
• To assess the diagnostic yield and management implications of ILR monitoring in this high-risk population.

Main Methods:

• A prospective study involving 29 patients hospitalized within six months of stroke or transient ischemic attack.
• Implantation of ILR in all participants for continuous cardiac rhythm monitoring.
• A mean follow-up period of one year with analysis of recorded transmissions.

Main Results:

• Continuous monitoring detected arrhythmias in 5 patients, including 3 cases of atrial fibrillation.
• A total of 513 transmissions were recorded, with symptomatic episodes in 165 cases.
• Despite some false-positive over-sensing events, ILR facilitated the diagnosis of significant arrhythmias, leading to immediate anticoagulant therapy initiation in AF patients.

Conclusions:

• Loop recording monitoring using ILR is an effective strategy for the timely diagnosis of arrhythmias, particularly atrial fibrillation, in patients with cardiac embolism.
• Early diagnosis through ILR enables prompt initiation of appropriate anticoagulant therapy, potentially reducing the risk of future embolic events.