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  • Title: [Two cases of complete atrioventricular canal defect whose pulmonary vascular resistance were over 10 wood unit.m2 before 6 months of age].
    Author: Takeuchi T, Harada Y, Takiguchi M, Arai H, Satomi G, Yasukouchi S, Iwasaki Y, Kumita Y.
    Journal: Kyobu Geka; 1998 Mar; 51(5):370-3. PubMed ID: 9594494.
    Abstract:
    We report two cases with complete form of atrioventricular canal defect (CAVCD) accompanied by Down's syndrome whose pulmonary vascular resistance (Rp) were more than 10 Wood unit.m2 at the age of less than 6 months. One child was 3-month-old boy whose Rp was 12 Wood unit.m2. The open lung biopsy at 3 months old showed histopathological change of Heath-Edwards grade I. He underwent intracardiac repair at the age of 4 months. He is doing well at 30 months of postoperative period. Another child was 5-month-old girl whose Rp was 15.5 Wood unit.m2. Histopathological change of lung at 5 months old demonstrated Heath-Edwards grade III. She underwent intracardiac repair at the age of 7 months, 2 months after lung biopsy. However, she died of oversystemic pulmonary hypertension and low output syndrome 7 days after surgery. The postmortem examination revealed that pulmonary vascular obstructive disease progressed during 2 months interval between the lung biopsy and the operation. In conclusion, cardiac catheterization with estimation of Rp should be performed in the cases of CAVCD, especially in those with Down's syndrome, in early infancy. If Rp is more than 10 Wood unit.m2 and lung biopsy indicates the surgical indication, surgical intervention should be done as soon as possible since the pulmonary vascular obstructive disease may progress in a short period.
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