Primary myelofibrosis incidence is 1.15 -4.99 per 100.000 population and prevalence ranging between 1.76 - 4.05 per 100.000 population.In previous studies, cardiac involvement including coronary arterial thrombosis, myocardial infarction, pulmonary hypertension, asymptomatic pericardial effusion, cardiac tamponade, intractable cardiac failure due to intraventricular stenosis and valvular stenosis that occur in myeloproliferative neoplasms. There is a few number of studies in which cardiac lesions were evaluated in myeloproliferative neoplasms by using transthoracic echocardiography but still inadequate, so we need to understand more about cardiovascular complications in myeloproliferative neoplasms.