CARDIAC SARCOIDOSIS REVEALED BY SUPRAVNTRICULAR TACHYARDIA: A CASE REPORT

We report the case of a 65-year-old man who presented to the emergency department with palpitations. Initial evaluation revealed a supraventricular tachycardia, which was managed with standard therapy. Due to the absence of structural heart disease and the unusual presentation, advanced cardiac imaging was performed. Cardiac magnetic resonance imaging revealed areas of late gadolinium enhancement, while 18F-FDG PET scan showed focal myocardial uptake suggestive of inflammation. The constellation of findings raised strong suspicion for cardiac sarcoidosis. Corticosteroid therapy, cyclophosphamide and methotrexate were initiated with favorable clinical and electrophysiological outcomes. Cardiac sarcoidosis is a rare but potentially life-threatening manifestation of systemic sarcoidosis, often presenting with arrhythmias or conduction abnormalities. Diagnosis remains challenging due to the non-specific nature of symptoms and the variable sensitivity of diagnostic tools. This case underscores the importance of early multimodal imaging in patients with unexplained arrhythmias and highlights the need for increased awareness of cardiac sarcoidosis among clinicians.