[Complete heart block and pacemaker therapy in children (author's transl)]

Area of Science:

• Cardiology
• Pediatric Electrophysiology
• Congenital Heart Disease

Context:

• Congenital and acquired complete heart block present distinct etiologies and prognoses.
• Suprabifurcational blocks, often congenital, differ significantly from infrabifurcational blocks, typically acquired.
• Understanding these differences is crucial for appropriate clinical management.

Purpose:

• To differentiate between congenital and acquired complete heart block.
• To outline the distinct clinical characteristics and prognoses of suprabifurcational versus infrabifurcational blocks.
• To provide guidance on pacemaker selection and implantation timing in pediatric patients.

Summary:

• Congenital suprabifurcational blocks feature normal QRS, higher heart rates, and exercise adaptation, generally requiring pacemakers later in life.
• Acquired infrabifurcational blocks present with widened QRS, fixed low heart rates (40-50 bpm), and necessitate immediate pacemaker implantation if heart rate drops below 30-40 bpm or Adams-Stokes attacks occur.
• Demand pacemakers are recommended over obsolete fixed-rate systems, with lithium batteries preferred for longevity and size.

Impact:

• Improved management strategies for pediatric complete heart block based on etiology and block type.
• Enhanced decision-making regarding pacemaker implantation timing and device selection.
• Highlights ongoing challenges in pacemaker surgery, including infection and hardware complications, necessitating further research and technical solutions.