An aortic dissection may lead to hemopericardium when blood dissects through the media proximally. Such a massive amount血液渗出突破中膜时，主动脉剥离导致心包积血，大量出血致心包填塞。
This aortic dissection occurred just above the aortic root in a patient with Marfan's syndrome. The tear extends across 马凡综合征病人见主动脉根部上部发生剥离，主动脉向上撕裂。破裂发生后的很短时间内，心包积血和心包填塞接踵而来。