Related Experiment Video

Updated: Jun 22, 2026

Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model
03:45

Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model

Published on: August 8, 2022

Sarcomere mutations in cardiogenesis and ventricular noncompaction

Elizabeth McNally1, Lisa Dellefave

  • 1Department of Medicine, Section of Cardiology, The University of Chicago, Chicago, IL 60637, USA. emcnally@uchicago.edu

Trends in Cardiovascular Medicine
|May 27, 2009
PubMed

Insights

Ventricular noncompaction, a heart muscle disorder, is linked to sarcomere gene mutations. These findings suggest a connection between noncompaction and other cardiomyopathies, impacting heart function.

Area of Science:

  • Cardiology
  • Genetics
  • Developmental Biology

Background:

  • Ventricular noncompaction is a cardiomyopathy characterized by excessive trabeculation, resembling embryonic heart development.
  • It can lead to congestive heart failure, arrhythmias, and thromboembolic events.
  • Previously, multiple genes were implicated, but recent studies focus on sarcomere gene mutations.

Purpose of the Study:

  • To investigate the role of sarcomere gene mutations in ventricular noncompaction.
  • To explore the relationship between noncompaction, other cardiomyopathies, and sarcomere gene mutations.
  • To highlight specific genes like MYH7 and ACTC1 in this context.

Main Methods:

  • Genetic analysis of familial and sporadic cases of ventricular noncompaction.
  • Review of existing literature on sarcomere gene mutations in cardiomyopathies.
  • Comparative analysis of mutation spectra across different cardiac disorders.

Main Results:

  • Sarcomere gene mutations are identified in both familial and sporadic cases of ventricular noncompaction.
  • This association supports classifying noncompaction as a cardiomyopathy and suggests a continuum with hypertrophic and dilated cardiomyopathies.
  • MYH7 (beta-myosin heavy chain) and ACTC1 (cardiac actin) genes are highlighted.
  • A notable incidence of congenital heart malformations, including septal defects, is observed with these mutations.

Conclusions:

  • Normal myocardial and sarcomere function are crucial for proper ventricular compaction and septation.
  • Sarcomere gene mutations in noncompaction indicate a high risk for developing heart failure later in life.
  • These genetic findings provide insights into the pathogenesis of noncompaction and related cardiomyopathies.

More Related Videos

Dual-Dye Optical Mapping of Hearts from RyR2R2474S Knock-In Mice of Catecholaminergic Polymorphic Ventricular Tachycardia09:36

Dual-Dye Optical Mapping of Hearts from RyR2R2474S Knock-In Mice of Catecholaminergic Polymorphic Ventricular Tachycardia

Published on: December 22, 2023

Analysis of Cardiomyocyte Development using Immunofluorescence in Embryonic Mouse Heart10:56

Analysis of Cardiomyocyte Development using Immunofluorescence in Embryonic Mouse Heart

Published on: March 26, 2015

Related Concept Videos

Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
Cardiomyopathy I: Introduction and Classification01:25

Cardiomyopathy I: Introduction and Classification

Cardiomyopathy, or CMP, is a group of diseases affecting the myocardial structure, impairing its ability to pump blood effectively. This condition can lead to arrhythmias, heart failure, or sudden cardiac death.Cardiomyopathies are classified into primary and secondary categories:Primary Cardiomyopathy refers to conditions involving only the heart muscle that are often idiopathic (of unknown cause) or genetic. They primarily affect the myocardium without the involvement of other systemic...
Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

Cardiomyopathy IV: Restrictive Cardiomyopathy

Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...
Cardiomyopathy II: Dilated Cardiomyopathy01:30

Cardiomyopathy II: Dilated Cardiomyopathy

Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
Specialized Characteristics of Cardiac Muscles01:27

Specialized Characteristics of Cardiac Muscles

The primary role of cardiac muscles is to propel blood throughout the cardiovascular system. The cardiac muscle cells, or cardiomyocytes, exhibit specialized characteristics that allow them to perform this function.
Cardiac muscle cells are smaller than skeletal muscles, averaging 10–20 mm in diameter and 50–100 mm in length. However, they have large energy demands for continuous contraction and relaxation. This energy is almost exclusively derived from aerobic metabolism of energy reserves in...