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Published on: August 8, 2022
Genetic and Gender Influences on Hypertrophic Cardiomyopathy: A Comprehensive Population-based Study of Clinical
Shibba Takkar Chhabra1, Gautam Singal1, Anshuman Gupta1
1Department of Cardiology, DMC Hospital, Ludhiana, Punjab, India.
Insights
Genetic analysis of hypertrophic cardiomyopathy (HCM) in India reveals distinct patterns and highlights the need for broader gene screening. Only half of hereditary cases link to known genes, emphasizing further research for better diagnosis and management.
Area of Science:
- Cardiology
- Genetics
- Population Health
Background:
- Hypertrophic cardiomyopathy (HCM) is linked to left ventricular hypertrophy and significant morbidity.
- Its hereditary nature necessitates identifying population-specific genetic markers and gender disparities for improved management.
- Understanding these factors can enhance screening strategies for hypertrophic cardiomyopathy.
Purpose of the Study:
- To investigate the genetic patterns of hypertrophic cardiomyopathy (HCM) within the Indian population.
- To explore potential gender-associated differences in hypertrophic cardiomyopathy.
- To identify genetic markers and prevalence of HCM types in India.
Main Methods:
- Prospective analysis of medical records from 103 hypertrophic cardiomyopathy (HCM) patients.
- Genetic testing performed on 48 patients with a family history of HCM or sudden cardiac death.
- Echocardiography, clinical outcomes, and genetic testing results were documented and compared between genders.
Main Results:
- Genetic analysis revealed that only 50% of hereditary hypertrophic cardiomyopathy (HCM) cases were linked to known genes.
- Apical or midapical HCM (48%) and reverse curvature HCM (31.1%) were prevalent types.
- MYBPC3 and MYH7 were common genes, with variants found in emerging genes in Indian patients.
Conclusions:
- The prevalence of different hypertrophic cardiomyopathy (HCM) types varies in the Indian population.
- The study underscores the need for expanded genetic screening for hypertrophic cardiomyopathy in India due to limited known gene associations.
- Further research into genetic variations is crucial for effective hypertrophic cardiomyopathy management.
Background:
Hypertrophic cardiomyopathy (HCM), associated with left ventricular hypertrophy, can lead to significant morbidity. Given the hereditary association, identifying population-specific genetic markers and gender disparities could enable better screening and management strategies.
Aim:
The study aimed to observe the genetic patterns of HCM and investigate its gender associations among the Indian population.
Methodology:
A prospective analysis was performed based on the medical records of patients with HCM. Genetic testing was conducted among those with a family history of HCM or sudden cardiac death. Genetic testing results, echocardiography, and clinical outcomes were documented. The prevalence of HCM types and genetic abnormalities were estimated in the study population and were compared between the two genders.
Results:
The study included 103 patients with a mean age of 56.3 ± 13.9 years. Genetic analysis was conducted in 48/103 individuals based on the hereditary linkage. Only 50% of the 48 individuals had known genes associated with HCM. About 48% had apical or midapical HCM, and 31.1% had reverse curvature HCM. About 38% of apical and 60% of neutral or reverse curvature were associated with genetic abnormalities. The more commonly associated genes were MYBPC3 and MYH7. The current study also identified genetic variants in several emerging genes in Indian HCM patients.
Conclusion:
Our study findings indicate that the prevalence of different types of HCM is different in the Indian population. With only 50% of the hereditary HCM linked to known genes, the study calls for further screening of genes associated with HCM in the Indian population.
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