Prosthetic mitral valve thrombosis associated with new-onset hyperthyroidism due to Graves’ disease: a case report

In this case, the association of new-onset hyperthyroidism with bioprosthetic valve thrombosis is highly likely. Hyperthyroidism, characterized by a hypercoagulable state and hypofibrinolytic disorder, is known to be associated with thrombosis and thromboembolic events. As acute hyperthyroidism shows clinical features similar to endocarditis, an interdisciplinary approach, immediate appropriate diagnostic steps and management are crucial for a favourable outcome. This case suggests that hyperthyroidism should be considered in the differential diagnosis when evaluating new-onset valvular thrombosis.