 Hemopericardium has been reported to result from various afflictions including chest trauma, free wall rupture after a myocardial infarction, bleeding into the pericardial sac following a type A aortic dissection, and as a complication of invasive cardiac procedures.Acute leukemia has also been reported as a cause of the condition.Several cases of hemopericardium have also been reported as a side-effect of anticoagulants.