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Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model
Published on: August 8, 2022
Hypertrophic Cardiomyopathy: An Overview of Genetics and Management
Polakit Teekakirikul1,2,3, Wenjuan Zhu3,4, Helen C Huang5
1Division of Cardiology, Department of Medicine and Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China.
Insights
Hypertrophic cardiomyopathy (HCM) is a genetic heart condition causing left ventricular hypertrophy. Genetic insights are improving diagnosis and identifying potential therapies for this diverse cardiac disorder.
Area of Science:
- Cardiology
- Genetics
- Molecular Biology
Background:
- Hypertrophic cardiomyopathy (HCM) is a complex cardiac muscle disorder.
- It is characterized by unexplained left ventricular hypertrophy (LVH) and distinct histopathological features.
- HCM presents with variable symptoms, from asymptomatic to severe, and can lead to sudden cardiac death (SCD).
Purpose of the Study:
- To review current knowledge on the clinical genetics of HCM.
- To discuss the management strategies for patients with HCM.
- To highlight how genetic insights advance understanding and treatment of HCM.
Main Methods:
- Review of current scientific literature on hypertrophic cardiomyopathy.
- Analysis of genetic heterogeneity and its impact on pathogenesis.
- Synthesis of information on diagnostic and therapeutic approaches.
Main Results:
- HCM is genetically diverse, often linked to sarcomere protein gene mutations.
- Autosomal dominant inheritance is typical, but with variable expressivity and incomplete penetrance.
- Genetic discoveries have improved diagnostic capabilities and identified therapeutic targets.
Conclusions:
- Understanding the genetic basis of HCM is crucial for diagnosis and management.
- Gene-based testing aids in identifying at-risk individuals.
- Further research into molecular pathogenesis may lead to novel therapeutic agents for HCM.
Abstract:
Hypertrophic cardiomyopathy (HCM) is a genetically heterogeneous cardiac muscle disorder with a diverse natural history, characterized by unexplained left ventricular hypertrophy (LVH), with histopathological hallmarks including myocyte enlargement, myocyte disarray and myocardial fibrosis. Although these features can cause significant cardiac symptoms, many young individuals with HCM are asymptomatic or mildly symptomatic. Sudden cardiac death (SCD) may occur as the initial clinical manifestation. Over the past few decades, HCM has been considered a disease of sarcomere, and typically as an autosomal dominant disease with variable expressivity and incomplete penetrance. Important insights into the genetic landscape of HCM have enhanced our understanding of the molecular pathogenesis, empowered gene-based diagnostic testing to identify at-risk individuals, and offered potential targets for the development of therapeutic agents. This article reviews the current knowledge on the clinical genetics and management of HCM.
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