Overview
Eosinophilic myocarditis is characterized by eosinophil infiltration into the myocardium, leading to myocardial inflammation and dysfunction, which can manifest as dilated cardiomyopathy or acute necrotising myocarditis 13.Diagnosis
Clinical Presentation: Progressive heart failure, arrhythmias, and conduction abnormalities 1.
Laboratory Findings: Mild to marked eosinophilia in peripheral blood 1.
Imaging: Echocardiography may show dilated cardiomyopathy features 1.
Histopathology: Endomyocardial biopsy revealing eosinophilic infiltration; definitive diagnosis often made post-mortem or during transplantation 13.
Special Considerations: No specific extracardiac pathology noted in some cases 3.Management
Antiparasitic Therapy: Albendazole for suspected parasitic causes, such as Enterobius vermicularis, if history or suspicion exists 1.
Immunosuppressive Agents: No specific drug classes or doses mentioned; treatment may be guided by underlying cause 12.
Symptomatic and Supportive Care: Management of heart failure, arrhythmias, and conduction disturbances 1.
Heart Transplantation: Considered in severe refractory cases 1.Special Populations
Pediatrics: Not specifically addressed in provided abstracts.
Elderly: Not specifically addressed in provided abstracts.
Comorbidities: Underlying allergic diathesis may predispose to acute forms 3.Key Recommendations
Consider Endomyocardial Biopsy for Definitive Diagnosis when clinical suspicion is high despite negative initial findings (Evidence: Weak 1).
Treat Underlying Parasitic Infestations with broad-spectrum antiparasitics like albendazole if indicated (Evidence: Expert opinion 1).
Evaluate for and Manage Associated Eosinophilia through appropriate laboratory monitoring and targeted therapy (Evidence: Moderate 12).References
1 Bilinska ZT, Bilinska M, Grzybowski J, Przyluski J, Michalak E, Walczak E et al.. Unexpected eosinophilic myocarditis in a young woman with rapidly progressive dilated cardiomyopathy. International journal of cardiology 2002. link00304-2)
2 Hokibara S, Takamoto M, Isobe M, Sugane K. Effects of monoclonal antibodies to adhesion molecules on eosinophilic myocarditis in Toxocara canis-infected CBA/J mice. Clinical and experimental immunology 1998. link
3 Herzog CA, Snover DC, Staley NA. Acute necrotising eosinophilic myocarditis. British heart journal 1984. link