Do implantable loop recorders impact the survival of patients with recurrent unexplained syncope?

Figures

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  Central_Illustration 1. ICM arrhythmia detection and therapeutic interventions. AF, atrial fibrillation; CIEDs, cardiovascular implantable electronic devices; ICM, insertable cardiac monitor.

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  Figure 1. (a) Patient selection flowchart for arrhythmia detection analysis using Carelink Data. (b) Patient selection flowchart for therapeutic interventions analysis using Optum CDM Claims Data. CIEDs, cardiovascular implantable electronic devices; CRT, cardiac resynchronization therapy; ICD, implantable cardioverter defibrillator; ICM, insertable cardiac monitor; IPG, implantable pulse generator; Optum CDM, Optum Clinformatics Data Mart claims database.

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  Figure 2. Total number of distinct arrhythmias detected by ICM per patient, by patient indication for monitoring. AF, atrial fibrillation; ICM, insertable cardiac monitor; VT, ventricular tachycardia.

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  Figure 3. Types of arrhythmias detected by ICM, by patient indication for monitoring. AF, atrial fibrillation; ICM, insertable cardiac monitor; MVT, monomorphic ventricular tachycardia; VT, ventricular tachycardia. Note: Patients may contribute to more than one arrhythmia detection category, as all adjudicated ICM‐detected arrhythmias are represented for each patient. Detection rates for polymorphic ventricular tachycardia/ventricular fibrillation are not shown, as the percentages were < 1% for all patient groups aside from suspected AF (1.4%).

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  Figure 4. Cumulative arrhythmia‐related therapeutic interventions post‐ICM implant (procedures and medication changes), by patient indication. *Includes cardiovascular implantable electronic device implant or cardiac ablation. †Includes initiation or discontinuation of arrhythmia‐related medication (antiarrhythmic drug, rate control medication, or oral anticoagulant).

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  Figure 5. Arrhythmia‐related procedures received post‐ICM implant, by patient indication. AF, atrial fibrillation; CRT, cardiac resynchronization therapy‐ with defibrillator (CRT‐D) or pacemaker (CRT‐P); ICD, implantable cardioverter defibrillator; IPG, implantable pulse generator. *Includes ablations for AF, supraventricular tachycardia, or ventricular tachycardia.