Original articleCardiovascularCaval Blood Flow During Supine Exercise in Normal and Fontan Patients
Section snippets
Study Group
Three groups of children were investigated. Group A comprised 6 children with an extracardiac TCPC, group B, 8 children with an intraatrial TCPC, and group C, 6 healthy control subjects. Seven of the patients in group B were studied as part of a previously reported study [5]. Compared with the previous study, this study adds a control group and a group of children with an extracardiac TCPC operation. Baseline data are shown in Table 1. The operations included a two-stage procedure with an
Results
All children completed the protocol. One of the control subjects was moving excessively during exercise and it was not possible to achieve valid IVC flow measurements in that specific child. Age, height, weight, and body surface area did not differ between the three groups (Table 1).
Comment
This study compares real-time blood flow during exercise in children undergoing intraatrial and extracardiac TCPC operations with that of healthy children. The overall result was that both patient groups were able to respond to a submaximal lower limb exercise with a similar increase in heart rate and respiration and in IVC and aortic flows, which did not differ from the response in healthy children. The IVC flow in the two patient groups varied more with respiration than in the age-matched
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