Related Experiment Video
Updated: May 19, 2026
Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model
Published on: August 8, 2022
Cardiomyopathy classification: ongoing debate in the genomics era
Charles McCartan1, Robert Mason, S R Jayasinghe
1Genomics Research Centre, Griffith Health Institute, Griffith University, Parklands Drive, Southport, QLD 4222, Australia.
Insights
Cardiomyopathies, diseases affecting heart muscle, are increasingly understood through their genetic and molecular basis. Traditional classifications are evolving to incorporate this new knowledge for better disease understanding.
Area of Science:
- Cardiology
- Genetics
- Molecular Biology
Background:
- Cardiomyopathies encompass diverse heart muscle diseases, both primary and secondary to systemic conditions.
- Traditional classification relied on phenotypic appearance, which is now considered oversimplified.
- Advances in understanding pathophysiology, molecular, and genetic underpinnings necessitate a revised classification.
Purpose of the Study:
- To discuss the evolution of cardiomyopathy classification.
- To highlight the shift from morphological to molecular and genetic criteria.
- To emphasize the need for a classification system adaptable to future discoveries.
Main Methods:
- Review of traditional and emerging classification systems for cardiomyopathies.
- Analysis of recent advancements in understanding the genetic and molecular basis of cardiomyopathies.
- Discussion on the limitations of morphology-based classifications.
Main Results:
- Traditional morphological classifications are insufficient given current knowledge.
- Molecular and genetic insights are fundamentally changing how cardiomyopathies are understood and categorized.
- A new classification framework is needed to integrate genetic and molecular data.
Conclusions:
- The classification of cardiomyopathies is transitioning from morphology to molecular and genetic factors.
- Future classification systems must accommodate the growing understanding of genetic and molecular etiologies.
- This evolution promises more precise diagnosis and targeted therapies for cardiomyopathies.
Abstract:
Cardiomyopathies represent a group of diseases of the myocardium of the heart and include diseases both primarily of the cardiac muscle and systemic diseases leading to adverse effects on the heart muscle size, shape, and function. Traditionally cardiomyopathies were defined according to phenotypical appearance. Now, as our understanding of the pathophysiology of the different entities classified under each of the different phenotypes improves and our knowledge of the molecular and genetic basis for these entities progresses, the traditional classifications seem oversimplistic and do not reflect current understanding of this myriad of diseases and disease processes. Although our knowledge of the exact basis of many of the disease processes of cardiomyopathies is still in its infancy, it is important to have a classification system that has the ability to incorporate the coming tide of molecular and genetic information. This paper discusses how the traditional classification of cardiomyopathies based on morphology has evolved due to rapid advances in our understanding of the genetic and molecular basis for many of these clinical entities.
Related Concept Videos
01:25Cardiomyopathy I: Introduction and Classification
01:30Cardiomyopathy II: Dilated Cardiomyopathy
01:29Cardiomyopathy IV: Restrictive Cardiomyopathy
01:29Cardiomyopathy III: Hypertrophic Cardiomyopathy
01:29Cardiomyopathy V: Interprofessional Care
01:30Heart Failure IV: Classification and Diagnostic Evaluation