[A long-term follow-up study of cardiac resynchronization therapy for children with right ventricle-paced heart...

Area of Science:

• Pediatric Cardiology
• Cardiovascular Engineering
• Heart Failure Management

Background:

• Chronic right ventricle pacing can lead to heart failure in pediatric patients.
• Upgrading to cardiac resynchronization therapy (CRT) is a potential intervention.

Purpose of the Study:

• To evaluate the long-term efficacy of CRT in children with heart failure due to chronic right ventricle pacing.
• Assess the impact of CRT on functional status and cardiac dimensions.

Main Methods:

• Retrospective analysis of five pediatric patients upgraded to CRT.
• Evaluation of New York Heart Association (NYHA) functional classification, QRS duration, left ventricular dimensions, and ejection fraction pre- and post-CRT.
• Paired t-tests were used for statistical comparison.

Main Results:

• CRT significantly improved NYHA class to I-II, reduced QRS duration (182±21ms to 126±9ms), and decreased left ventricular end-diastolic diameter Z-score (4.7±0.9 to 2.8±1.1).
• Left ventricular ejection fraction (LVEF) significantly increased from 28%±6% to 43%±10%.
• No significant change in the standard deviation of peak systolic time of the left ventricular wall (TS-SD) was observed.

Conclusions:

• Cardiac resynchronization therapy (CRT) is a beneficial treatment for children experiencing heart failure from chronic right ventricle pacing.
• CRT demonstrates significant improvements in cardiac function and functional capacity in this pediatric population.
• Long-term follow-up indicates the potential for sustained benefits, though device longevity and potential complications like ventricular fibrillation require consideration.