LMNA-Mediated Arrhythmogenic Right Ventricular Cardiomyopathy and Charcot-Marie-Tooth Type 2B1: A Patient-Discovered Unifying Diagnosis

J Cardiovasc Electrophysiol. 2016 Jul;27(7):868-71. doi: 10.1111/jce.12984. Epub 2016 May 31.

Abstract

Arrhythmogenic right ventricular cardiomyopathy (ARVC) is an uncommon cardiomyopathy most classically associated with mutations in genes encoding desmosomal proteins. Recent literature has identified mutations in several non-desmosomal proteins including lamins that may result in the ARVC phenotype. We describe a patient who discovered her own pathogenic LMNA mutation that offered a unifying diagnosis explaining her ARVC and Charcot-Marie-Tooth phenotypes as well as musculoskeletal abnormalities. Suspicion for LMNA-mediated cardiomyopathy should arise in patients with extracardiac manifestations of laminopathies and testing for specific gene mutations may be helpful in establishing an unifying diagnosis.

Keywords: ARVC/D; Charcot-Marie-Tooth; arrhythmia; arrhythmogenic right ventricular cardiomyopathy; cardiomyopathy; genetics; lamin.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Arrhythmogenic Right Ventricular Dysplasia / diagnosis
  • Arrhythmogenic Right Ventricular Dysplasia / genetics*
  • Charcot-Marie-Tooth Disease / diagnosis
  • Charcot-Marie-Tooth Disease / genetics*
  • DNA Mutational Analysis
  • Female
  • Genetic Predisposition to Disease
  • Heredity
  • Humans
  • Lamin Type A / genetics*
  • Laminopathies
  • Male
  • Middle Aged
  • Mutation*
  • Pedigree
  • Phenotype
  • Predictive Value of Tests
  • Risk Factors

Substances

  • LMNA protein, human
  • Lamin Type A

Supplementary concepts

  • Charcot-Marie-Tooth disease, Type 2B1