This is a purulent pericarditis. Note the yellowish exudate that has pooled in the lower pericardial sac seen been opene化脓性心包炎。注意黄色的分泌液淤积在已被切开的心包腔内下部。
Without inflammation, blood in the pericardial sac would be called hemopericardium.在心包腔里没有炎症仅有出血，称作心包积血。