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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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Acute Coronary Syndrome III: Diagnostic Studies01:30

Acute Coronary Syndrome III: Diagnostic Studies

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Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
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Myocarditis III: Medical Management01:14

Myocarditis III: Medical Management

178
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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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 III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

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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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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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Diagnostic algorithm for clozapine-induced myocarditis: A systematic review.

Yassir Mahgoub1, Rawan Alhau2, Yumna Magzoub3

  • 1Department of Psychiatry and Behavioral Health, Penn State College of Medicine, Hershey, PA 17033, United States. ymahgoub@pennstatehealth.psu.edu.

World Journal of Psychiatry
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PubMed
Summary

A new diagnostic algorithm improves clozapine-induced myocarditis (CIM) detection, differentiating it from pneumonia. This aids in safe clozapine rechallenge for resistant schizophrenia patients.

Keywords:
ClozapineMultidisciplinary managementMyocarditisPneumoniaProtocolRechallenge

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Area of Science:

  • Cardiology
  • Psychiatry
  • Radiology

Background:

  • Clozapine is crucial for resistant schizophrenia but underused due to risks like clozapine-induced myocarditis (CIM).
  • Current diagnostic methods for CIM are non-specific, leading to misdiagnosis and overlap with clozapine-induced pneumonia (CIP).

Purpose of the Study:

  • Develop a diagnostic algorithm for CIM to improve accuracy.
  • Differentiate CIM from CIP and guide safe clozapine rechallenge.
  • Enhance patient outcomes in schizophrenia treatment.

Main Methods:

  • Systematic review of 119 PubMed studies (1990-2025) following PRISMA guidelines.
  • Analysis of diagnostic biomarkers, imaging techniques (CMR, CT), and clinical outcomes.
  • Focus on multidisciplinary collaboration involving cardiology and radiology.

Main Results:

  • CIM diagnosis often relies on troponin and CRP; ECG/echocardiography are inconsistently used, and cardiac MRI (CMR) is underutilized.
  • A proposed protocol integrates chest CT to rule out pneumonia and CMR for CIM confirmation.
  • Successful rechallenge rates range from 64.7% to 68.9%, with a 2.9% fatality rate; up to 65% of presumed CIM cases lack confirmation.

Conclusions:

  • Multidisciplinary collaboration using CT, CMR, and cardiology enhances CIM diagnosis.
  • Slow clozapine titration can prevent CIM; dose adjustment for CIP and discontinuation for confirmed CIM are recommended.
  • Improved diagnostic accuracy facilitates safer and more effective clozapine therapy.