Familial ebstein anomaly, left ventricular hypertrabeculation, and ventricular septal defect associated with a MYH7 mutation

Am J Med Genet A. 2013 Dec;161A(12):3187-90. doi: 10.1002/ajmg.a.36182. Epub 2013 Aug 16.


Ebstein anomaly is a rare congenital heart defect that most often occurs sporadically within a kindred. Familial cases, although reported, are uncommon. At this time, the genetic etiology of Ebstein anomaly is not fully elucidated. Here, we describe clinical and molecular investigations of a rare case of familial Ebstein anomaly in association with a likely pathogenic mutation of the MYH7 gene. The severity of presentation varies, and Ebstein anomaly can be observed in association with such other heart defects as ventricular septal defect and left ventricular (LV) hypertrabeculation, as seen in our family of study. In our family of study, the 31-year-old father and four of his children have been diagnosed with Ebstein anomaly. Genetic testing revealed that the father was heterozygous for the Glu1220del variant detected in exon 27 of the MYH7 gene. The MYH7 gene encodes the β-myosin heavy chain and is expressed in cardiac muscle. DNA sequencing of three of his affected children confirmed that they carried the same variant while the fourth affected child was not available for testing. This is the first report of familial Ebstein anomaly associated with the Glu1220del mutation of the MYH7 gene. The mutation segregates with disease in a family with autosomal dominant transmission of congenital heart defects including Ebstein anomaly and other associated cardiovascular defects including LV hypertrabeculation and ventricular septal defect.

Keywords: Ebstein anomaly; MYH7 gene; familial Ebstein anomaly; left ventricular hypertrabeculation; ventricular septal defect.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Cardiac Myosins / genetics*
  • Child
  • Child, Preschool
  • Ebstein Anomaly / complications
  • Ebstein Anomaly / genetics*
  • Ebstein Anomaly / physiopathology
  • Echocardiography
  • Female
  • Heart Septal Defects, Ventricular / complications
  • Heart Septal Defects, Ventricular / genetics*
  • Heart Septal Defects, Ventricular / physiopathology
  • Heterozygote
  • Humans
  • Infant
  • Male
  • Mutation
  • Myosin Heavy Chains / genetics*
  • Ventricular Dysfunction, Left / complications
  • Ventricular Dysfunction, Left / genetics*
  • Ventricular Dysfunction, Left / physiopathology


  • MYH7 protein, human
  • Cardiac Myosins
  • Myosin Heavy Chains