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- W2041269080 abstract "To define the respective roles of the periphery and central oxygen transport in the exercise limitation of heart transplanted patients (HTR), we compared 11 HTR (15.1 +/- 10.8 months after transplantation) to six age and weight matched normal controls (C), during an incremental exercise test (30 W/3 min steps; supine position), up to peak exercise level. The C stopped between 120 and 240 W (mean = 180 +/- 39 W), whereas the HTR all reached 90 W, with a significantly lower oxygen uptake (VO2), cardiac index (CI) and arterio-venous oxygen difference (AVO2D) values (respectively VO2: 16.6 +/- 2.6 vs 30.0 +/- 9.3 ml.min-1.kig-1 STPD; CI: 6.84 +/- 1.10 vs 10.55 +/- 2.86l.min-1.m-2; AVO2D: 94 +/- 13 vs 109 +/- 9 ml.l-1; all p < 0.05) but with similar lactate (LA) values (respectively 7.25 +/- 1.98 vs 7.71 +/- 1.55 mmol.l-1; p = NS). At the 90 W step which corresponds to the peak level that all the HTR reached, the C were close to their anaerobic threshold and showed similar parameters of oxygen transport (VO2: 17.4 +/- 2.0; CI: 7.50 +/- 0.41; AVO2D:90 +/- 10) but a lower lactate level (LA: 2.93 +/- 4.76; p < 0.002). At the same intermediate exercise levels VO2, CI and AVO2D were similar in both groups, while the closely matched LA and ventilation increased faster in HTR, reaching significantly higher levels as soon at the 30 W step. This evidence for an increased anaerobic exercise energy generation in HTR suggests that the periphery participates significantly in their exercise limitation, a phenomenon that might be improvable by retraining.means+/-standard deviation." @default.
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- W2041269080 date "1996-05-01" @default.
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- W2041269080 title "Persistent Exercise Intolerance Following Cardiac Transplantation Despite Normal Oxygen Transport" @default.
- W2041269080 doi "https://doi.org/10.1055/s-2007-972847" @default.
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