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Related Concept Videos

Myocarditis II: Clinical Features and Diagnostic Tests01:27

Myocarditis II: Clinical Features and Diagnostic Tests

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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...
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Myocarditis I: Introduction01:21

Myocarditis I: Introduction

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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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Myocarditis III: Medical Management01:14

Myocarditis III: Medical Management

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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...
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Myasthenia Gravis: Diagnostic Tests01:15

Myasthenia Gravis: Diagnostic Tests

978
Myasthenia gravis is an autoimmune condition affecting neuromuscular transmission, causing generalized weakness in skeletal muscles. Initial diagnoses rely on patients' signs, symptoms, and medical history. The challenge lies in distinguishing myasthenia from other muscular dystrophies. An important diagnostic feature is the significant improvement of symptoms after administering anticholinesterase inhibitors.
The edrophonium test is a diagnostic tool for myasthenia gravis. It involves...
978
Myocarditis IV: Nursing Management01:22

Myocarditis IV: Nursing Management

13
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...
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Myasthenia Gravis: Overview and Treatment01:20

Myasthenia Gravis: Overview and Treatment

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Myasthenia gravis is a neuromuscular transmission disorder characterized by weakness and increased fatigability of skeletal muscles. It is an autoimmune disease affecting approximately one in 2000 people, where antibodies against the α1 subunit of nicotinic acetylcholine receptors are produced.
These antibodies interfere with the function of the nicotinic receptors in three ways: by binding to the receptor and disrupting acetylcholine binding; by causing cross-linking of receptors which...
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Related Experiment Video

Updated: Jul 16, 2025

Modeling Myotonic Dystrophy 1 in C2C12 Myoblast Cells
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Modeling Myotonic Dystrophy 1 in C2C12 Myoblast Cells

Published on: July 29, 2016

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Polymyositis: A Case Report.

Mariana Rios-Gomez1, Arturo Villanueva-Salinas1, Sarahi Arias-Martinez1

  • 1Internal Medicine, Hospital Regional de Pemex en Salamanca, Salamanca, MEX.

Cureus
|September 13, 2023
PubMed
Summary
This summary is machine-generated.

Polymyositis, an immune-mediated muscle disease, presents with progressive weakness. Diagnosis relies on clinical signs, elevated muscle enzymes, and muscle biopsy confirming inflammatory myopathy.

Keywords:
elevated creatine phosphokinase (cpk)elevated liver transaminasesinflammatory myopathypolymyositisrare muscular disease.

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Area of Science:

  • Neurology
  • Immunology
  • Pathology

Background:

  • Inflammatory myopathies involve immune-mediated muscle damage.
  • Polymyositis is a rare inflammatory myopathy characterized by progressive, symmetrical proximal muscle weakness.

Observation:

  • A 61-year-old male presented with generalized symmetrical weakness, particularly in the upper extremities, and dysphagia.
  • Diagnostic workup included laboratory studies, autoantibody testing, and muscle biopsy.

Findings:

  • Laboratory tests revealed elevated sarcoplasmic enzymes.
  • Nerve conduction studies helped differentiate myopathic from neuropathic causes.
  • Muscle biopsy confirmed polymyositis, aligning with clinical and laboratory findings.

Implications:

  • This case highlights the diagnostic criteria for polymyositis.
  • Accurate diagnosis through muscle biopsy is crucial for managing inflammatory myopathies.
  • Understanding the clinical and pathological features aids in patient care and research.