Related Experiment Video

Updated: Nov 21, 2025

Left Atrial Stenosis Induced Pulmonary Venous Arterialization and Group 2 Pulmonary Hypertension in Rat
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Published on: November 18, 2018

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Genetic Etiology of Left-Sided Obstructive Heart Lesions: A Story in Development

Lauren E Parker1, Andrew P Landstrom1,2

  • 1Division of Cardiology Department of Pediatrics Duke University School of Medicine Durham NC.

Journal of the American Heart Association
|January 12, 2021
PubMed

Insights

Genetic factors contribute to left-sided obstructive lesions (LSOLs), a common congenital heart defect. Current genetic associations explain only a small percentage of cases, highlighting the need for further research into complex genetic interactions.

Area of Science:

  • Cardiovascular Genetics
  • Developmental Biology
  • Pediatric Cardiology

Background:

  • Congenital heart disease (CHD) is the most frequent birth defect.
  • Left-sided obstructive lesions (LSOLs) are a significant subset of CHD, including conditions like hypoplastic left heart syndrome and coarctation of the aorta.
  • Nonsyndromic LSOLs exhibit familial aggregation and high sibling recurrence, suggesting a strong heritable component.

Purpose of the Study:

  • To review current knowledge on genes and variants associated with LSOLs.
  • To discuss the limitations of existing genetic associations for LSOLs.
  • To identify future research directions for understanding the genetic basis of nonsyndromic CHD.

Main Methods:

  • Literature review of genetic studies on LSOLs.
  • Analysis of current genetic sequencing and exome sequencing advancements.
  • Discussion of rare and common variant contributions to LSOLs.

Main Results:

  • Known LSOL-associated genes explain only 10-20% of affected patients.
  • Evidence suggests both rare and common genetic variants contribute to LSOL development.
  • The role of combinatorial variant effects is an emerging area of study.

Conclusions:

  • Significant gaps remain in understanding the genetic etiology of nonsyndromic LSOLs.
  • Further research is crucial to identify novel genes and understand complex genetic interactions.
  • Advancing genetic research will improve diagnosis and potentially inform therapeutic strategies for CHD.

Keywords:
aortic stenosisbicuspid aortic valvecoarctation of the aortacongenital heart diseasehypoplastic left heart syndromeinterrupted aortic arch

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