Premature ventricular contractions in normal children

Area of Science:

• Pediatric Cardiology
• Electrophysiology
• Clinical Pediatrics

Background:

• Premature ventricular contractions (PVCs) are frequently observed in pediatric populations with structurally normal hearts.
• Understanding the characteristics and long-term outlook of these arrhythmias is crucial for appropriate clinical management.

Purpose of the Study:

• To evaluate the clinical characteristics and prognosis of premature ventricular contractions (PVCs) in a cohort of children without underlying cardiac or systemic disease.
• To assess the impact of exercise on PVC frequency and the spontaneous resolution rate of PVCs during follow-up.

Main Methods:

• A study cohort of 149 children diagnosed with PVCs and normal cardiac findings was retrospectively analyzed.
• Patients underwent evaluation via serial Holter monitoring and exercise stress testing.
• Follow-up data, including repeat Holter recordings, were collected to assess changes in PVC burden over time.

Main Results:

• The majority of patients presented with unifocal PVCs, with 51% experiencing symptoms.
• Holter monitoring revealed isolated PVCs in 82% of cases, with 9% showing couplets/triplets and 9% exhibiting nonsustained ventricular tachycardia.
• Exercise testing showed a decrease or disappearance of PVCs in 61.9% of children, while 48.1% experienced improvement during follow-up.
• No significant correlation was found between PVC frequency and treatment, age, gender, or exercise-induced changes.

Conclusions:

• Premature ventricular contractions in children with normal cardiac anatomy generally carry a benign prognosis.
• A significant proportion of pediatric PVC cases demonstrate spontaneous improvement or resolution, particularly during follow-up periods.
• These findings support a conservative management approach for asymptomatic or mildly symptomatic PVCs in this population.