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Related Concept Videos

Cardiomyopathy I: Introduction and Classification01:25

Cardiomyopathy I: Introduction and Classification

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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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Cardiomyopathy II: Dilated Cardiomyopathy01:30

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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 III: Hypertrophic Cardiomyopathy01:29

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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...
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Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

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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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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...
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Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...
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Pacemaker-induced cardiomyopathy.

Shirley Fletcher-Hall1

  • 1Shirley Fletcher-Hall is a chief PA in the Department of Hospital Medicine at Montefiore Health System Bronx, N.Y., and a clinical assistant professor at Marist College in Poughkeepsie, N.Y. The author has disclosed no potential conflicts of interest, financial or otherwise.

JAAPA : Official Journal of the American Academy of Physician Assistants
|September 5, 2023
PubMed
Summary

Chronic right ventricular pacing can lead to cardiomyopathy and heart failure. This condition, often overlooked, causes significant heart problems and hospitalizations, highlighting the need for better pacing strategies.

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Heart Failure Research

Background:

  • Chronic right ventricular (RV) pacing is a common procedure for heart rhythm management.
  • Research indicates a link between long-term RV pacing and the development of cardiomyopathy and heart failure.
  • RV apical pacing, specifically, has been associated with adverse cardiac remodeling and functional decline.

Purpose of the Study:

  • To describe the detrimental effects of permanent cardiac pacemakers on cardiac function.
  • To highlight the association between chronic RV pacing and the development of cardiomyopathy and heart failure.
  • To emphasize the need for further research into alternative pacing methods and preventative treatments.

Main Methods:

  • Review of existing research and clinical studies on chronic RV pacing.
  • Analysis of the mechanisms linking RV pacing to ventricular dyssynchrony and myocardial remodeling.
  • Synthesis of evidence regarding the impact of RV pacing on cardiac function and heart failure development.

Main Results:

  • Chronic RV pacing, particularly at the apex, can induce significant ventricular dyssynchrony.
  • This dyssynchrony contributes to reduced cardiac function and the progression of heart failure.
  • Permanent pacemakers, when used for chronic RV pacing, are associated with deleterious cardiac effects.

Conclusions:

  • Chronic RV pacing is an underrecognized cause of cardiomyopathy and heart failure.
  • Ventricular dyssynchrony and myocardial remodeling are key consequences of RV pacing.
  • Further investigation into preventative strategies and alternative pacing modalities is crucial to mitigate these risks.