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Related Concept Videos

Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

Cardiomyopathy IV: Restrictive Cardiomyopathy

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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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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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Structure of Cardiac Muscles01:13

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Cardiac muscle, or myocardium, is a specialized type of muscle found exclusively in the heart. Its unique structural and functional characteristics enable the heart to perform its vital role of pumping blood throughout the body continuously and rhythmically. The cardiac muscle cells, or cardiomyocytes, possess an endomysium and perimysium but do not have an epimysium.
Compared to skeletal muscles, cardiac muscle cells are small and mostly have a single nucleus. Additionally, they are usually...
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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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Myocarditis I: Introduction01:21

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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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Myocardial Bridging.

Shi-Min Yuan1

  • 1The First Hospital of Putian, Teaching Hospital, Fujian Medical University, Fujian Province, China.

Brazilian Journal of Cardiovascular Surgery
|April 14, 2016
PubMed
Summary
This summary is machine-generated.

Myocardial bridging, a rare condition affecting coronary arteries, can lead to serious cardiac events. Surgical myotomy is preferred for symptomatic patients unresponsive to medical treatment.

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Area of Science:

  • Cardiology
  • Vascular Surgery

Background:

  • Myocardial bridging is an uncommon congenital anomaly where a segment of a coronary artery travels through the heart muscle.
  • It is most frequently observed in the mid-left anterior descending coronary artery, with diverse anatomical variations.
  • Endothelial changes and vasoactive substances can influence atherosclerosis progression in myocardial bridging.

Purpose of the Study:

  • To review the clinical presentation, pathophysiology, and management of myocardial bridging.
  • To highlight the efficacy of surgical myotomy versus other interventions.

Main Methods:

  • Literature review of myocardial bridging cases.
  • Analysis of clinical presentations, diagnostic findings, and treatment outcomes.

Main Results:

  • Symptoms include chest pain, myocardial infarction, arrhythmia, and sudden death.
  • Medical management with beta-blockers is often insufficient for severe cases.
  • Surgical myotomy is the preferred intervention for symptomatic patients.
  • Coronary stent deployment shows limited long-term efficacy.

Conclusions:

  • Myocardial bridging requires careful management, especially in symptomatic individuals.
  • Surgical myotomy offers a viable solution for patients with poor response to medical therapy.
  • Further research is needed to improve long-term outcomes for myocardial bridging interventions.