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  • Title: Role of inhaled nitric oxide as a selective pulmonary vasodilator in pediatric cardiac surgical practice.
    Author: Murthy KS, Rao SG, Prakash KS, Robert C, Dhinakar S, Cherian KM.
    Journal: Indian J Pediatr; 1999; 66(3):357-61. PubMed ID: 10798083.
    Abstract:
    Our aim was to assess the role of inhaled nitric oxide (NO) therapy in post operative cases of congenital heart defects who developed pulmonary arterial hypertensive (PAH) crisis and had no response with conventional management. From February '95 to January '97, inhaled NO therapy was used in 21 children. Age ranged from 2 months to 9 years (mean 5.6 years) and duration of therapy ranged from 1 to 13 days. Of 21 patients, 17 responded well with 5-20 ppm while 4 did not. The preoperative mean pulmonary systolic pressure was 88 mm Hg against mean systemic pressure of 96 mm Hg. Post operatively, their PA pressure reduced to 62 mm Hg, with systemic pressure of 98 mm Hg. After using inhaled NO, PA pressure dropped to 24 mm Hg (mean systolic) (p < 0.007), after excluding the non responders. Of 4 non responders, two died due to irreversible pulmonary vascular disease and remaining two died due to residual defects. The study shows that inhaled NO is a selective pulmonary vasodilator, which is useful in postoperative PAH crisis and also reduces the transpulmonary gradient in single ventricle repair cases. It is safe and effective for prolonged use. It is very useful in Indian perspective, when more number of cases with congenital heart defects (CHD) along with severe PAH are encountered routinely.
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