摘要
Objectives To analyze the six-minute walk test (6MWT) and gas exchange of 5 heart transplantation patients and to approach the variation tendency of exercise tolerance, oxygen uptake ( VO2 ) and heart rate chronotropic response. Methods 5 cases of heart transplantation patients ( age 25 - 52 years) were undertaken 6MWT 6 - 30 months after operation, synchronizing gas exchanging parameters were measured by wireless portable remote sensing K4B^2 gas analyzer, 51 normal controls were compared. Results The six-minute walk distance (6MWD) of 5 patients were (592.6 ± 26.7 ) m (558 - 625 ) m, the ascending tendency during exercise was slower, the maximum heart rates were 80% ± 6% of age-predicting maximal heart rate, lower than normal control (86%) ; the end point VO2/kg were (21.8 ± 1.4 ) mL/min · kg ( 19. 94 - 23.60) mL/min · kg. Conclusions The 6WMD and VO2 of 5 patients reached normal range, but the heart rate chronotropic response and VO2 ascending tendency were slower than those of normal controls.
Objectives To analyze the six-minute walk test (6MWT) and gas exchange of 5 heart transplantation patients and to approach the variation tendency of exercise tolerance, oxygen uptake ( VO2 ) and heart rate chronotropic response. Methods 5 cases of heart transplantation patients ( age 25 - 52 years) were undertaken 6MWT 6 - 30 months after operation, synchronizing gas exchanging parameters were measured by wireless portable remote sensing K4B^2 gas analyzer, 51 normal controls were compared. Results The six-minute walk distance (6MWD) of 5 patients were (592.6 ± 26.7 ) m (558 - 625 ) m, the ascending tendency during exercise was slower, the maximum heart rates were 80% ± 6% of age-predicting maximal heart rate, lower than normal control (86%) ; the end point VO2/kg were (21.8 ± 1.4 ) mL/min · kg ( 19. 94 - 23.60) mL/min · kg. Conclusions The 6WMD and VO2 of 5 patients reached normal range, but the heart rate chronotropic response and VO2 ascending tendency were slower than those of normal controls.