Publication Sub Type
Journal Article, Original
Philippine Journal of Internal Medicine
This study associated the pre-operative hemodynamic oxygen challenge parameters with immediate post-operative survival. One hundred percent oxygen challenge was given to seven atrial septal defect and two patent ductus arteriosus cases with borderline hemodynamic parameters, Those excluded were cases with pulmonary disease and valvular heart disease. The challenge lowered the pulmonary and systemic resistance ratio by 43 ± 19.25%, decreased the pulmonary vascular resistance by 36.54 ± 19.73%, and increased the systemic vascular resistance by 25.32 ± 12.81%. There was no change in the pulmonary artery pressure. All survived the immediate post-operative period. Thus, the trend of decreasing RP/RS and increasing QP/QS ratios after oxygen challenge seem to predict a good immediate postoperative outcome.