 The condition can be caused by full-thickness necrosis (death) of the myocardium (heart muscle) after myocardial infarction, chest trauma, and by over-prescription of anticoagulants.Other causes include ruptured aneurysm of sinus of Valsalva and other aneurysms of the aortic arch.Hemopericardium can be diagnosed with a chest X-ray or a chest ultrasound, and is most commonly treated with pericardiocentesis.