Accuracy of symptoms and pulse checking for detecting atrial fibrillation following catheter ablation

Area of Science:

• Cardiology
• Electrophysiology
• Medical Monitoring

Background:

• Growing interest exists in discontinuing oral anticoagulation after successful catheter ablation for atrial fibrillation (AF).
• Accurate detection of AF recurrences by patients post-ablation is currently unknown.
• Assessing patient self-detection methods is crucial for managing anticoagulation strategies.

Purpose of the Study:

• To evaluate the accuracy of patient self-assessment, specifically pulse checking and symptom reporting, in identifying atrial fibrillation recurrences after catheter ablation.
• To compare patient-reported data with objective data from insertable cardiac monitors (ICMs).

Main Methods:

• Prospective cohort study involving 55 patients treated with catheter ablation for AF.
• Patients used an insertable cardiac monitor (ICM) and performed twice-daily pulse checks, recording results and symptoms in a diary for 2 months.
• Accuracy was determined by comparing patient self-assessment to ICM-detected AF episodes.

Main Results:

• 280 episodes of AF were detected by ICMs in 26 patients.
• Patients suspected AF in 362 instances, with only 37% correlating with ICM-detected AF (true positive rate).
• Twice-daily pulse checks showed 47% sensitivity and 96% specificity for AF detection, with a 4% false negative rate.

Conclusions:

• Patient self-assessment using pulse checks and symptom reporting is insufficient for identifying all atrial fibrillation recurrences post-ablation.
• Continuous monitoring via devices like ICMs is necessary for accurate AF detection in this population.
• Current self-assessment strategies may not adequately inform decisions about discontinuing oral anticoagulation.