Abstract: 23 cases of thrombus formation in cardiac cavity werestudied. 9 were caused by extensive trauma in soft tissue, 13by various cardiac diseases. There was no significant difference between trauma and heart disease (p > 0. 05). Thewhite thrombus formation was mainly caused by truma andwas often found in the right cardiac cavity (P< 0.001 ). Themixed thrombus was mainly caused by heart disease and nodifference was found between in fight and left cardiac cavity(p > 0. 05). The types, positions and causes of thrombuswere significantly related (p < 0. 001 ). The causes, pathologic mechanism and forensic identification of thrombus formation in cardiac cavity were discussed.

Key words: thrombus formation, cardiac cavity, forensic identification