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Familial sick sinus syndrome in two siblings
1Department of Pediatrics, Hacettepe University Faculty of Medicine, Ankara.
The Turkish Journal of Pediatrics
|January 1, 1993
Summary
Two siblings experienced severe sinus node disease, necessitating permanent pacing. Their condition suggests a genetic link, possibly autosomal dominant inheritance with variable penetrance for this cardiac disorder.
Area of Science:
- Cardiology
- Genetics
- Electrophysiology
Background:
- Sinus node disease, a critical cardiac condition, affects heart rhythm regulation.
- Permanent pacing is a common intervention for symptomatic sinus node dysfunction.
Observation:
- Two siblings presented with severe sinus node disease requiring permanent pacemaker implantation.
- Electrophysiologic study in one sibling revealed concurrent atrioventricular conduction disturbance alongside sinus node dysfunction.
Findings:
- The affected siblings' parents and other relatives did not exhibit signs of sinus node disorder.
- The familial occurrence points towards a potential genetic basis for the observed sinus node disease.
Implications:
- The findings suggest an autosomal dominant inheritance pattern for this specific type of sinus node disease.
- Variable penetrance may explain why only certain family members are affected, despite the genetic predisposition.