Activation delay-induced mechanical dyssynchrony in single-ventricle heart disease

Area of Science:

• Pediatric Cardiology
• Cardiac Electrophysiology
• Congenital Heart Disease

Background:

• Single functional ventricle physiology presents unique challenges in pediatric cardiac care.
• Ventricular dysfunction and heart failure are significant concerns in infants with complex congenital heart defects.
• Electrical activation patterns play a crucial role in overall cardiac function.

Observation:

• An infant diagnosed with a single functional ventricle presented with worsening ventricular dysfunction.
• Clinical deterioration progressed to overt heart failure.
• Cardiac evaluation revealed evidence of electrical activation delay and dyssynchrony.

Findings:

• The infant's heart failure was attributed to impaired electrical conduction within the ventricle.
• Ventricular dyssynchrony was identified as a key factor contributing to reduced cardiac output.
• This electrical abnormality represented a potentially reversible cause of heart failure.

Implications:

• Early detection of electrical activation delays and dyssynchrony is critical in infants with single functional ventricles.
• Interventions targeting electrical dyssynchrony may offer a therapeutic strategy to prevent or manage heart failure.
• Improved understanding of electrophysiological disturbances can guide management and potentially alter clinical trajectories in complex pediatric heart disease.