Abstract
Hypomethylating agents are commonly used in the treatment of myelodysplastic syndromes and are known to cause bone marrow suppression; however, cardiac complications are rare. We describe a patient who was diagnosed with acute myeloid leukemia and developed myopericarditis after receiving chemotherapy with azacitidine. Our case highlights the importance of a thorough history, including medication review, in patients with suspected myopericarditis. It also raises awareness about the potential cardiac side effects of azacitidine.