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long QT syndrome type 4 (sick sinus syndrome with bradycardia)
Genetics:
- associated with defects in ankyrin 2 (ANK2)
Clinical manifestations:
- displays many atypical features compared to classical long QT syndromes
Special laboratory:
- electrocardiogram
a) pronounced sinus bradycardia
b) polyphasic T waves
c) atrial fibrillation
- cardiac repolarization defects may be not as severe as in classical LQT syndromes
- prolonged QT interval on EKG is not a consistent feature
Interactions
disease interactions
Related
sick sinus syndrome; atrial fibrillation with bradyarrhythmia; tachycardia-bradycardia syndrome
General
long QT syndrome
Database Correlations
OMIM 600919
References
OMIM :accession 600919