Cardiac Hydatid Disease with Palpitations as the Only Presenting Complaint: The Egg in the Nest

Hydatid disease, also known as cystic echinococcosis, is a parasitic infection caused by the larval stage of Echinococcus granulosus. It usually invades organs such as the liver and the lungs but can affect any organ. Isolated cardiac involvement is a rare manifestation. We present a case of isolated left ventricle hydatid cyst with negative serological tests, which was treated with surgical removal and confirmed by histopathological examination. LEARNING POINTS: Isolated cardiac hydatid disease is rare and accounts for only 0.5-2% of cases among infected patients.Cardiac hydatidosis may present with a wide variety of clinical manifestations ranging from no symptoms to sudden death; palpitations may be the only complaint.Surgical excision is the treatment of choice for cardiac hydatid disease to avoid high-risk complications.