Hemopericardium

The accumulation of blood within the pericardial cavity, that may acutely increase intrapericardial pressure and precipitate life-threatening cardiac tamponade. Possible causes are trauma, invasive cardiac procedures, myocardial infarction with myocardial rupture, aortic dissection, ruptured aneurysm, medications (anticoagulants, thrombolytics), malignancy (bleeding metastasis from lung/breast/lymphoma), or tuberculosis.