title: Cardiac dysrhythmias,cardiomyopathy and muscular dystrophy in patients with Emery-Dreifuss muscular dystrophy and limb-girdle muscular dystrophy type 1B.
abstract: Emery-Dreifuss muscular dystrophy (EDMD) and limb-girdle muscular dystrophy type 1B (LGMD1B) are characterized by cardiac dysrhythmias, late-onset cardiomyopathy, slowly progressive skeletal myopathy and contractures of the neck, elbows and ankles. The causative mutation is either in the emerin gene (X-linked recessive EDMD) or lamin A/C gene (autosomal dominant EDMD2 or LGMD1B). We report three cases of EDMD, EDMD2 and LGMD1B. A 14-yr-old boy showed limitation of cervical flexion and contractures of both elbows and ankles. Sinus arrest with junctional escape beats was noted. He was diagnosed as X-linked recessive EDMD (MIM 310300). A 28-yr-old female showed severe wasting and weakness of humeroperoneal muscles. Marked limitation of cervical flexion and contractures of both elbows and ankles were noted. Varying degrees of AV block were noted. She was diagnosed as autosomal dominant EDMD2 (MIM 181350). A 41-yr-old female had contractures of both ankles and limb-girdle type muscular dystrophy. ECG revealed atrial tachycardia with high grade AV block. She was diagnosed as autosomal dominant LGMD1B (MIM 159001). Cardiac dysrhythmias in EDMD and LGMD1B include AV block, bradycardia, atrial tachycardia, atrial fibrillation, and atrial standstill, causing sudden death necessitating pacemaker implantation. Cardiologists should know about these unusual genetic diseases with conduction defects, especially in young adults.
authors.affiliation: Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea.
authors.forename: Jong-Seo
authors.initials: JS
authors.lastname: Hong
authors.forename: Chang-Seok
authors.initials: CS
authors.lastname: Ki
authors.forename: Jong-Won
authors.initials: JW
authors.lastname: Kim
authors.forename: Yeon-Lim
authors.initials: YL
authors.lastname: Suh
authors.forename: June Soo
authors.initials: JS
authors.lastname: Kim
authors.forename: Kyung Kee
authors.initials: KK
authors.lastname: Baek
authors.forename: Byoung Joon
authors.initials: BJ
authors.lastname: Kim
authors.forename: Kyoung Ju
authors.initials: KJ
authors.lastname: Ahn
authors.forename: Duk-Kyung
authors.initials: DK
authors.lastname: Kim
mesh_terms: D000293:Adolescent; D000328:Adult; D001145:Arrhythmias, Cardiac / Q000209:etiology*; D009202:Cardiomyopathies / Q000209:etiology*; D005260:Female; D006801:Humans; D008297:Male; D018482:Muscle, Skeletal / Q000473:pathology*; D049288:Muscular Dystrophies, Limb-Girdle / Q000150:complications* / Q000235:genetics / Q000473:pathology / Q000503:physiopathology; D020389:Muscular Dystrophy, Emery-Dreifuss / Q000150:complications* / Q000235:genetics / Q000473:pathology / Q000503:physiopathology