Transposition of the Great Arteries

Abstract

Group 2-A (11 patients with defect of ventricular septum and pulmonic stenosis). Data for this group are summarized in Table 13.In no patient was a definite left-to-right shunt demonstrated at the atrial level. An increase in oxygen saturation occurred at the ventricular level in 6, whereas in 5 the increase in oxygen saturation was not noted until the aorta was sampled. It is assumed that the left-to-right shunt did occur at the ventricular level in the latter group as well. That the shunt did not occur at the ductal level is inferred from the fact that the pulmonary-artery pressure . . .