Eosinophilic granulomatosis with polyangiitis associated with malignant arrhythmias: a case report.

Background: Eosinophilic granulomatosis with polyangiitis (EGPA) is a rare vasculitis associated with significant cardiac morbidity and mortality. This case report presents the diagnostic and management challenges of EGPA-related arrhythmias in a remote general hospital setting.

Case summary: A 64-year-old Caucasian male presented with an indolent prodrome of fatigue, shortness of breath and anorexia, that culminated in an acute presentation with pulmonary embolism. His complicated clinical course included intracranial haemorrhage and refractory ventricular arrhythmias. Eosinophilia and sub-endocardial hypoattenuation observed on chest computed tomography were key findings that led to the diagnosis of EGPA. Multiple anti-arrhythmic therapies were required as temporary measures whilst control of the underlying eosinophilic inflammation was achieved.Once stable, the patient was transferred to a tertiary cardiac centre for further investigation and cardioverter-defibrillator implantation. With EGPA now well controlled, he has experienced no further ventricular arrhythmias and has fully recovered.

Conclusion: Cardiac complications of EGPA, including ventricular arrhythmias, are difficult to manage without concurrent immunosuppression, which may itself further destabilize cardiac electrophysiology. The role of multiple imaging modalities in the diagnosis and monitoring of EGPA is emphasized, with cardiac magnetic resonance imaging playing a crucial role in detecting sub-endocardial fibrosis.