Use of implantable and external loop recorders in syncope with unknown causes

Area of Science:

• Cardiology
• Medical Devices
• Diagnostic Tools

Background:

• Syncope diagnosis relies on correlating symptoms with electrocardiogram (ECG) findings.
• Internal loop recorders (ILR) and external loop recorders (ELR) are used for ECG monitoring in unexplained syncope.
• Limited research compares the clinical utility of ILR and ELR for syncope diagnosis.

Purpose of the Study:

• To review the clinical usefulness of ILR and ELR in diagnosing and managing unexplained syncope.
• To evaluate the diagnostic yield and impact on treatment strategies for ILR and ELR.
• To provide guidance on selecting appropriate ECG monitoring tools for syncope patients.

Main Methods:

• Systematic review of observational studies and randomized controlled trials.
• Analysis of data on diagnostic yield, time to diagnosis, and impact on management.
• Comparison of ILR and ELR performance in patients with unexplained syncope.

Main Results:

• ILR use in unexplained syncope leads to earlier diagnosis and improved diagnosis rates.
• ILR provides crucial information for syncope mechanism and treatment strategy.
• No evidence currently shows ILR improves overall mortality or quality of life.
• ELR demonstrates a diagnostic yield comparable to ILR within similar monitoring periods.

Conclusions:

• ELR can be considered for initial long-term ECG monitoring before transitioning to ILR if needed.
• A systematic approach to selecting ECG monitoring tools can reduce healthcare costs.
• Optimized tool selection improves patient selection for effective treatment possibilities.