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Published on: February 28, 2012
Role of new generation implantable loop recorders in managing undiagnosed pediatric cardiac symptoms
Pedro Agudo-Montore1, Graham Stuart2, Deirdre Wilson2
1Department of Pediatrics, Division of Cardiology, Virgen del Rocío Children Hospital, Seville, Spain.
Insights
Implantable loop recorders (ILRs) effectively diagnose pediatric arrhythmias like sinus pauses and VT. These safe devices guide management in 80% of diagnosed cases, improving patient care.
Area of Science:
- Pediatric Cardiology
- Cardiac Electrophysiology
- Medical Devices
Background:
- Pediatric cardiac symptoms like syncope and palpitations can be challenging to diagnose.
- These symptoms may indicate serious arrhythmias or inherited cardiac conditions (ICCs).
- Accurate diagnosis is crucial for effective management and improving quality of life.
Purpose of the Study:
- To evaluate the diagnostic effectiveness and safety of implantable loop recorders (ILRs) in pediatric patients.
- To assess the impact of ILR findings on subsequent patient management.
- To determine the role of ILRs in diagnosing arrhythmias presenting as palpitations, syncope, or seizure-like episodes.
Main Methods:
- Retrospective cohort study of 155 pediatric patients implanted with ILRs over 8 years.
- Patients presented with symptoms such as palpitations, chest pain, syncope, or had known high-risk ICCs.
- Analysis of diagnostic yield for arrhythmias and changes in management post-ILR implantation.
Main Results:
- ILRs detected relevant arrhythmias in 60% of symptom-activated and 80% of device-activated transmissions.
- Most common arrhythmias included sinus pauses (37.5%) and ventricular tachycardia (VT, 30%).
- Approximately 80% of patients with diagnosed arrhythmias received targeted management; 2.5% experienced minor complications.
Conclusions:
- New-generation ILRs are safe and effective for diagnosing and managing pediatric arrhythmias.
- ILR implantation provides reassurance to pediatric patients and their families.
- Further research is needed on ILR impact on quality of life and sports participation in high-risk children.
Abstract:
Pediatric cardiac symptoms such as palpitations, syncope, or seizure-like episodes pose diagnostic challenges for general pediatricians. These symptoms, though often benign, may reveal underlying arrhythmias or inherited cardiac conditions (ICCs), affecting the quality of life and limiting activity participation. The purpose of this study is to determine the effectiveness and safety of implantable loop recorders (ILRs) in diagnosing and managing arrhythmias in pediatric patients. A retrospective cohort study conducted over an 8-year period from January 2016 to December 2023 in a single pediatric cardiology center. A cohort of 155 pediatric patients (median age 11.4 years) who underwent ILR implantation were selected based on symptoms such as palpitations, chest pain, or syncope, and those with previously recorded arrhythmias or high-risk ICCs. The primary outcomes were the diagnostic yield of ILRs for arrhythmias and subsequent changes in patient management. Diagnostic yield was defined as the detection of relevant arrhythmias, such as pauses of 3 s or longer, high-degree AV block, sinus node dysfunction, supraventricular tachycardia, ventricular tachycardia, or inappropriate sinus tachycardia. The median follow-up period was 2.3 years (845 days). Diagnostic arrhythmias were recorded in 60% of patients with symptom-activated transmissions and 80% of device-activated transmissions. Sinus pauses (37.5%) and VT (30%) were the most common arrhythmias detected. In patients with syncope (n = 76), 30% had relevant arrhythmias. In the palpitations group (n = 20), 35% had relevant arrhythmias. Approximately 80% of patients with ILR-diagnosed arrhythmias underwent targeted management, including medication changes and additional procedures. No significant complications were observed; minor complications occurred in 2.5% of patients.Conclusions: New generation ILRs are effective and safe for diagnosing and managing pediatric arrhythmias, providing significant reassurance to patients and families. Further studies are needed to evaluate the impact of ILRs on quality of life and sports participation in high-risk young patients.
