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  • Title: Blunt cardiac trauma: lessons learned from the medical examiner.
    Author: Teixeira PG, Georgiou C, Inaba K, Dubose J, Plurad D, Chan LS, Toms C, Noguchi TT, Demetriades D.
    Journal: J Trauma; 2009 Dec; 67(6):1259-64. PubMed ID: 20009675.
    Abstract:
    OBJECTIVE: The objective of this study was to analyze autopsy findings after blunt traumatic deaths to identify the incidence of cardiac injuries and describe the patterns of associated injuries. METHODS: All autopsies performed by the Los Angeles County Forensic Medicine Division for blunt traumatic deaths in 2005 were retrospectively reviewed. Only cases that underwent a full autopsy including internal examination were included in the analysis. The study population was divided into two groups according to the presence or absence of a cardiac injury and compared for differences in baseline characteristics and types of associated injuries. RESULTS: Of the 881 fatal victims of blunt trauma received by the Los Angeles County Forensic Medicine Division, 304 (35%) underwent a full autopsy with internal examination and were included in the analysis. The mean age was 43 years +/- 21 years, patients were more often men (71%) and were intoxicated in 39% of the cases. The most common mechanism was motor vehicle collision (50%), followed by pedestrian struck by auto (37%), and 32% had a cardiac injury. Death at the scene was significantly more common in patients with a cardiac injury (78% vs. 65%, p = 0.02). The right chambers were the most frequently injured (30%, right atrium; 27%, right ventricle). Among the 96 patients with cardiac injuries, 64% had transmural rupture. Multiple chambers were ruptured in 26%, the right atrium in 25%, and the right ventricle in 20% of these patients. Patients with cardiac injuries were significantly more likely to have other associated injuries: thoracic aorta (47% vs. 27%, p = 0.001), hemothorax (81% vs. 59%, p < 0.001), rib fractures (91% vs. 71%, p < 0.001), sternum fracture (32% vs. 13%, p < 0.001), and intra-abdominal injury (77% vs. 48%, p < 0.001) compared with patients without cardiac injury. Of the 96 patients with a cardiac injury, 78% died at the scene of the crash and 22% died en route or at the hospital. CONCLUSION: Cardiac injury is a common autopsy finding after blunt traumatic fatalities, with the majority of deaths occurring at the scene. Patients with cardiac injuries are at significantly increased risk for associated thoracic and intra-abdominal injuries.
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