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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...
Heart Failure II: Pathophysiology01:29

Heart Failure II: Pathophysiology

Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
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...
Mitral Regurgitation I: Introduction01:20

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Mitral regurgitation is characterized by the backward circulation of blood from the left ventricle to the left atrium during systole, a phase of the cardiac cycle when the heart contracts and pumps blood out of the chambers. This abnormal flow occurs primarily due to the dysfunction of the mitral valve or its supporting structures, which include the mitral leaflets, chordae tendineae, annulus, and papillary muscles.Etiology and Mechanisms:Primary Mitral Regurgitation: This type arises from...
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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,...
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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...

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Related Experiment Video

Updated: Jun 23, 2026

Studying Left Ventricular Reverse Remodeling by Aortic Debanding in Rodents
07:26

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Published on: July 14, 2021

Left ventricular non-compaction: a new mutation predisposing to reverse remodeling?

Nuno Cortez-Dias1, Manuel Gato Varela, Luís Sargento

  • 1Serviço de Cardiologia, Hospital de Santa Maria, Lisboa, Portugal.

Revista Portuguesa De Cardiologia : Orgao Oficial Da Sociedade Portuguesa De Cardiologia = Portuguese Journal of Cardiology : an Official Journal of the Portuguese Society of Cardiology
|May 15, 2009
PubMed
Summary
This summary is machine-generated.

Left ventricular non-compaction (LVNC) can cause heart failure. A TAZ gene mutation was identified in a patient whose aortic regurgitation, not LVNC, drove symptoms, showing varied myocardial response.

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Area of Science:

  • Cardiology
  • Genetics
  • Cardiomyopathy Research

Background:

  • Left ventricular non-compaction (LVNC) is a rare genetic cardiomyopathy characterized by prominent ventricular trabeculations.
  • Its genetic heterogeneity and variable clinical presentation necessitate further investigation into underlying mechanisms.
  • LVNC serves as a crucial model for understanding cardiomyopathies.

Observation:

  • A young male presented with progressive congestive heart failure.
  • Advanced imaging revealed LVNC, severe aortic regurgitation, and impaired left ventricular systolic function.
  • Family history suggested a genetic basis for the condition.

Findings:

  • Genetic analysis identified a novel p.Phe128Ser mutation in the TAZ gene (c.383T>C) in the affected patient.
  • Severe aortic regurgitation, independent of LVNC, was the primary driver of clinical symptoms.
  • Surgical aortic valve replacement led to significant clinical improvement and reverse remodeling.

Implications:

  • This case highlights the TAZ gene's role in LVNC and introduces a new mutation associated with the disorder.
  • The findings underscore the importance of addressing secondary conditions like aortic regurgitation in LVNC management.
  • The observed reverse remodeling suggests diverse myocardial responses in LVNC patients, impacting prognosis and treatment strategies.