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  • Title: [A pathological study of in situ thrombosis of small pulmonary arteries and arterioles in autopsy cases of chronic cor pulmonale].
    Author: Wang C, Du M, Cao D.
    Journal: Zhonghua Yi Xue Za Zhi; 1997 Feb; 77(2):123-5. PubMed ID: 9596944.
    Abstract:
    OBJECTIVE: To study the incidence of thrombosis of small pulmonary arteries and arterioles during the exacerbation stage of chronic cor pulmonale. METHODS: 49 autopsy cases died from the exacerbation of chronic cor pulmonale were chosen as the study group, while other 103 autopsy cases without chronic cor pulmonale and disseminated intravascular coagulation (DIC) as control group. Morphologic and morphometric studies were taken on lung tissues and other organs with focus on the thrombi in small pulmonary arteries and arterioles. RESULTS: 44 cases of the study group had multiple thrombi in small pulmonary arteries and arterioles, the incidence is 89.8%, and in 9 of them, thrombi in proximal pulmonary arteries co-existed, the incidence is 18.4%, 80% of the thrombi existed in pulmonary arteriole. In control group, only 3 cases had thrombi in small pulmonary arteries and arteriole, the incidence is 2.9%. All thrombi adhered to endangium, implying that they were in situ thrombi. No intravascular thrombosis were found in other organs. chi(2) test showed that the incidence of thrombosis and the number of thrombi in small pulmonary arteries and arteriole in cases with chronic cor pulmonale were significantly higher than that of the control group (P < 0.01). CONCLUSIONS: Multiple in situ thrombosis in small pulmonary arteries and arterioles is a prominent and common pathological change during the exacerbation stage of chronic cor pulmonale. The study suggests a new diagnostic and therapeutic concept and provides a morphological and theoretical basis for the clinical application of anticoagulants or even the thrombolytic agents for the cases of chronic cor pulmonale in the exacerbation stage.
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