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Related Concept Videos

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 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...
Autoimmune Disorders01:29

Autoimmune Disorders

Autoimmune diseases are a group of disorders in which the body's immune system mistakenly attacks its own cells, tissues, and organs. This results from an overactive immune response against substances and tissues normally present in the body. Let's delve into the concept and mechanism of autoimmune diseases from an immune system point of view, explore different causes and examples of such diseases, and discuss potential solutions.
Concept and Mechanism of Autoimmune Diseases
The immune system...
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...

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Related Experiment Video

Updated: Jun 19, 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

Myocarditis: infection versus autoimmunity.

Noel R Rose1

  • 1Departments of Pathology and of Molecular Microbiology and Immunology, Johns Hopkins Center for Autoimmune Disease Research, Johns Hopkins University, Room 659, Baltimore, MD 21205, USA. nrrose@jhsph.edu

Journal of Clinical Immunology
|October 15, 2009
PubMed
Summary
This summary is machine-generated.

Diagnosing myocarditis (heart muscle inflammation) is challenging. Combining biopsies with molecular tools helps identify causes, guiding better treatments for viral or autoimmune heart conditions.

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Isolation and Identification of Extravascular Immune Cells of the Heart
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Isolation and Identification of Extravascular Immune Cells of the Heart

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

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Last Updated: Jun 19, 2026

Flow Cytometry-Based Quantification and Analysis of Myocardial B-Cells
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Isolation and Identification of Extravascular Immune Cells of the Heart
08:24

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

Published on: June 20, 2014

Area of Science:

  • Cardiology
  • Immunology
  • Infectious Diseases

Background:

  • Myocarditis, or heart muscle inflammation, presents a significant therapeutic challenge.
  • Causes often involve viral infections, necessitating differentiation between infectious, immune-mediated, or mixed etiologies for effective treatment.

Purpose of the Study:

  • To explore advanced diagnostic tools for differentiating myocarditis causes.
  • To investigate the interplay between viral infections and autoimmune responses in myocarditis.
  • To identify potential therapeutic strategies based on specific myocarditis etiologies.

Main Methods:

  • Utilizing endomyocardial biopsies combined with molecular and immunologic assays.
  • Applying nucleic acid hybridization and polymerase chain reaction for viral genome detection.
  • Analyzing cardiac biopsies for antibodies to cardiac antigens and HLA expression.
  • Investigating myocarditis pathogenesis in animal models using coxsackievirus B3 and cardiac myosin immunization.

Main Results:

  • Newer diagnostic tools show promise in distinguishing myocarditis etiologies.
  • Detection of persistent viral genomes in the heart is feasible.
  • Early trials suggest type 1 interferons may benefit patients with enteroviral myocarditis.
  • Biomarkers like antibodies and HLA expression can identify patients potentially responsive to immunosuppression or immunoadsorption.
  • Animal models reveal pathways from viral myocarditis to chronic autoimmune conditions and dilated cardiomyopathy.

Conclusions:

  • Differentiating myocarditis causes through integrated diagnostic approaches is crucial for targeted therapy.
  • Myocarditis serves as a model to understand viral-autoimmune disease interactions.
  • Insights from human and animal studies offer hope for improved myocarditis treatments.