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Related Concept Videos

Myocarditis III: Medical Management01:14

Myocarditis III: Medical Management

Myocarditis: Comprehensive Medical ManagementMyocarditis, the heart muscle inflammation, requires a comprehensive medical management strategy that addresses the underlying cause, provides supportive care, manages symptoms, and reduces cardiac workload.Infections and Autoimmune CausesAdminister appropriate antimicrobial therapy when an infectious agent causes myocarditis. For instance, penicillin treats infections caused by Group A Streptococcus. In cases where autoimmune processes are...
Myocarditis I: Introduction01:21

Myocarditis I: Introduction

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...
Myocarditis II: Clinical Features and Diagnostic Tests01:27

Myocarditis II: Clinical Features and Diagnostic Tests

Myocarditis is an inflammation of the heart muscle. The symptoms vary widely, encompassing asymptomatic presentations to severe, acute manifestations.Clinical PresentationAsymptomatic cases: In some instances, myocarditis may be asymptomatic, with the infection resolving without intervention. These cases often go undetected unless discovered incidentally through diagnostic imaging or tests conducted for other reasons.General Early Symptoms: Early symptoms of myocarditis are non-specific and can...
Myocarditis IV: Nursing Management01:22

Myocarditis IV: Nursing Management

Myocarditis is an inflammatory condition of the myocardium requiring meticulous nursing management for optimal patient outcomes. Effective management begins with a thorough assessment of the patient's medical history, paying close attention to past infections, autoimmune disorders, travel history, and exposure to toxins or drugs. Recent viral infections and systemic diseases are particularly relevant due to their potential role in triggering myocarditis.Physical Examination and MonitoringThe...
Myasthenia Gravis ll: Pathophysiology01:22

Myasthenia Gravis ll: Pathophysiology

The disease process of myasthenia gravis begins at the neuromuscular junction, where antibodies attack key proteins needed for muscle activation. This immune reaction weakens signal transmission, leading to the characteristic muscle fatigue and weakness that define the condition.Immune-Mediated DamageIn most individuals, antibodies target acetylcholine receptors (AChRs) on the postsynaptic membrane of muscle cells. By blocking acetylcholine binding, these antibodies prevent the nerve signal...
Pericarditis I: Introduction01:22

Pericarditis I: Introduction

Pericarditis is defined as the inflammation of the pericardium, the thin, sac-like membrane surrounding the heart. This condition can cause significant chest pain and other symptoms, often necessitating medical intervention. The pericardium has two layers: the inner visceral layer and the outer parietal layer, separated by a small amount of fluid that reduces friction during heartbeats.Types of PericarditisPericarditis can be classified into several types based on the duration and nature of the...

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Related Experiment Video

Updated: May 11, 2026

Flow Cytometry-Based Quantification and Analysis of Myocardial B-Cells
12:46

Flow Cytometry-Based Quantification and Analysis of Myocardial B-Cells

Published on: August 17, 2022

Autoimmunity in viral myocarditis.

Jay Reddy1, Chandirasegaran Massilamany, Iwona Buskiewicz

  • 1School of Veterinary Medicine and Biomedical Sciences and Nebraska Center for Virology, University of Nebraska-Lincoln, Lincoln, Nebraska, USA.

Current Opinion in Rheumatology
|May 10, 2013
PubMed
Summary
This summary is machine-generated.

Viral infections can trigger autoimmune responses against the heart, leading to myocarditis. This occurs when microbes mimic cardiac proteins, causing the immune system to attack heart tissue.

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Isolation and Identification of Extravascular Immune Cells of the Heart
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Related Experiment Videos

Last Updated: May 11, 2026

Flow Cytometry-Based Quantification and Analysis of Myocardial B-Cells
12:46

Flow Cytometry-Based Quantification and Analysis of Myocardial B-Cells

Published on: August 17, 2022

Noninvasive Assessment of Cardiac Abnormalities in Experimental Autoimmune Myocarditis by Magnetic Resonance Microscopy Imaging in the Mouse
12:24

Noninvasive Assessment of Cardiac Abnormalities in Experimental Autoimmune Myocarditis by Magnetic Resonance Microscopy Imaging in the Mouse

Published on: June 20, 2014

Isolation and Identification of Extravascular Immune Cells of the Heart
08:24

Isolation and Identification of Extravascular Immune Cells of the Heart

Published on: August 23, 2018

Area of Science:

  • Immunology
  • Cardiology
  • Infectious Diseases

Background:

  • Myocarditis, an inflammation of the heart muscle, often follows microbial infections.
  • Autoimmunity to cardiac antigens is a key factor in heart failure development, especially when viral infections are cleared quickly.

Purpose of the Study:

  • To review the mechanisms by which autoimmunity is induced in viral myocarditis.
  • To explore the role of microbial-cardiac antigen mimicry in disease pathogenesis.

Main Methods:

  • Review of clinical and experimental studies on viral myocarditis.
  • Analysis of mouse models demonstrating CD4+ T cell responses to cardiac alpha myosin heavy chain (αMYHC).

Main Results:

  • Autoimmunity, specifically T cell responses to cardiac αMYHC, is crucial for myocarditis development.
  • Microbial epitopes can mimic cardiac antigens like αMYHC, leading to cross-reactive immune responses.
  • Innate immune responses during cardiac infection influence the expression of cryptic cardiac epitopes.

Conclusions:

  • Antigenic mimicry between microbes and cardiac proteins is a primary cause of autoimmunity in myocarditis.
  • The characteristics of the innate immune response dictate the presentation of critical cardiac epitopes, influencing disease severity.