Abstract: Objective To investigate the causes and features of medical disputes in percutaneous coronary intervention（PCI） in the cardiology and to provide references for forensic expert testimony and medical disputes prevention. Methods Fifty one disputed fatal cases in PCI were analyzed in terms of the cause of death, informed consent and medical operations retrospectively. Results Thirty five cases were due to medical negligence, 28 due to defect technical operation, 2 due to mistake medical management and 5 due to both defect technical operation and mistake medical management. Conclusion The causes of PCI medical negligence are defect medical operation, violate medical disciplines and insufficiency of informed consent.

Key words: forensic medicine, angioplasty, transluminal, percutaneous coronary, death, medical disputes