[Conduction system disease and Charcot-Marie-Tooth syndrome]

Area of Science:

• Cardiology
• Neurology
• Genetics

Background:

• Charcot-Marie-Tooth (CMT) syndrome is a group of inherited neurological disorders affecting peripheral nerves.
• Atrioventricular (A-V) block is a condition where the electrical signal between the heart's upper and lower chambers is impaired.

Observation:

• A 57-year-old patient with a family history of Charcot-Marie-Tooth syndrome presented with complete A-V block.
• The patient's mother also had complete A-V block, indicating a potential familial pattern.
• The A-V block was attributed to trifascicular disease, affecting the heart's conduction system.

Findings:

• A strong association was observed between Charcot-Marie-Tooth syndrome and complete A-V block in this patient and their family.
• The presence of trifascicular disease explains the cardiac conduction defect in the patient.

Implications:

• This case highlights a potential genetic link between Charcot-Marie-Tooth syndrome and cardiac conduction abnormalities, specifically A-V block.
• Further research is needed to determine if this association is genetically determined or coincidental.
• Understanding this link could improve diagnostic and therapeutic strategies for patients with CMT syndrome and cardiac conditions.