Cardiac Involvement in Eosinophilic Granulomatosis with Polyangiitis: A Meta-analysis of 62 Case Reports

Background: Eosinophilic granulomatosis with polyangiitis (EGPA) is a rare multi-systemic vasculitis, with cardiac involvement being one of its most serious manifestations. We aimed to systematically review and analyze the limited case reports of EGPA with cardiac involvement. Methods: Based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, we performed a systematic literature search for the case reports of EGPA with cardiac involvement in the MEDLINE database from 2011 until 2018. For each case, clinical data including sex, age, clinical presentation, electrocardiographic and cardiac imaging findings, the type of cardiac involvement, the available laboratory data (cardiac biomarkers, white blood cell count, eosinophilic count, erythrocyte sedimentation rate, C-reactive protein, and antineutrophil cytoplasmic antibody positivity), therapeutic regimen, and the outcome of the patients were collected and analyzed. Results: A total number of 62 cases were included. The mean age was 48.29±15.60 years, and 51.6% were male. All the cases were in the active disease state. Cardiac symptoms, electrocardiographic abnormalities, abnormal biomarkers, and abnormal echocardiography were detected in 82.3%, 68.5%, 77.4%, and 96.8%, respectively. Cardiac magnetic resonance was done in 46.8% of the patients, and it was abnormal in all. The most common abnormal findings in echocardiography were systolic left ventricular dysfunction (83.9%) and pericardial effusion (37.1%). The most common type of clinical presentation was clinical heart failure (51.6%). Only 6.5% of the patients presented with tamponade. The overall prognosis was good. Conclusion: Any part of the heart could be involved by EGPA. The results emphasize the necessity of in-depth cardiac evaluation in these patients.