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Related Concept Videos

Heart Failure II: Pathophysiology01:29

Heart Failure II: Pathophysiology

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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...
101
Cardiomyopathy II: Dilated Cardiomyopathy01:30

Cardiomyopathy II: Dilated Cardiomyopathy

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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,...
73
Cardiomyopathy V: Interprofessional Care01:29

Cardiomyopathy V: Interprofessional Care

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Managing cardiomyopathy involves addressing underlying or precipitating causes, treating heart failure with medications, and implementing dietary changes and a balanced exercise and rest regimen.Lifestyle ModificationsCardiomyopathy patients should adopt a low-sodium diet to reduce fluid retention and manage heart failure. A personalized exercise and rest plan helps maintain physical fitness without overstraining the heart. Avoiding alcohol and tobacco is essential to prevent further damage to...
65
Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

94
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...
94
Cardiomyopathy I: Introduction and Classification01:25

Cardiomyopathy I: Introduction and Classification

123
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...
123
Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

Cardiomyopathy IV: Restrictive Cardiomyopathy

105
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...
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Related Experiment Video

Updated: Oct 15, 2025

Permanent Ligation of the Left Anterior Descending Coronary Artery in Mice: A Model of Post-myocardial Infarction Remodelling and Heart Failure
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Electrical Ventricular Remodeling in Dilated Cardiomyopathy.

Christine Mages1,2,3, Heike Gampp1,2, Pascal Syren1,2

  • 1Department of Cardiology, Medical University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany.

Cells
|October 23, 2021
PubMed
Summary

Ventricular arrhythmias in heart failure (HF) stem from fibrosis and ion channel changes. This review explores dilated cardiomyopathy (DCM) mechanisms and potential therapies for these life-threatening heart rhythm disorders.

Keywords:
dilated cardiomyopathyion channelremodelingsudden cardiac deathventricular arrhythmia

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Area of Science:

  • Cardiology
  • Molecular Biology
  • Electrophysiology

Background:

  • Ventricular arrhythmias are a major cause of death in heart failure (HF) patients.
  • Myocardial fibrosis and ion channel remodeling in ventricular cardiomyocytes contribute to arrhythmogenesis in structural heart disease.
  • Ion channel dysregulation is linked to cardiomyopathy and arrhythmia development, with molecular signaling pathways becoming clearer.

Purpose of the Study:

  • To review the clinical and cellular electrophysiologic characteristics of dilated cardiomyopathy (DCM) related to ventricular ionic and structural alterations.
  • To highlight potential translational strategies and therapeutic options for ventricular arrhythmias in DCM.

Main Methods:

  • Literature review focusing on clinical studies and cellular electrophysiology research.
  • Analysis of molecular signaling pathways involved in ion channel dysregulation and cardiac remodeling.
  • Synthesis of information on therapeutic targets and translational approaches.

Main Results:

  • Dilated cardiomyopathy (DCM) exhibits specific ionic and structural alterations at the ventricular level that promote arrhythmias.
  • Understanding molecular signaling pathways is crucial for elucidating the mechanisms of arrhythmogenicity in HF.
  • Various potential therapeutic strategies targeting ion channels and fibrosis are being investigated.

Conclusions:

  • Ventricular arrhythmias in DCM are driven by complex electrophysiologic and structural changes.
  • Targeting molecular pathways offers promising avenues for novel therapeutic interventions.
  • Further research into translational strategies is essential for improving outcomes in HF patients with arrhythmias.