Oxygen Consumption During Recovery From Exercise in Children With Congenital Heart Disease

Spectral and bout detection analysis of physical activity patterns in healthy, prepubertal boys and girls

“…Recovery dynamics for HR and V . O 2 are also prolonged in children with diseases of the heart or lung (Drakonakis et al, 1974), and this is consistent with the generally reduced levels of physical activity associated with chronic disease. Conversely, HR and V .…”

Peak Oxygen Consumption (V̇O2peak) Recovery Delay in a Pediatric Fontan Population

“…Singh et al, noted that due to all participants exercising to exhaustion, and the strength of the association between VO 2peak and VO2RD, the variation in the rate VO2RD may have resulted from differences in oxygen delivery during recovery and not from differences in the magnitude of the oxygen debt (22). Other studies have observed similar findings (20,23,26,(33)(34)(35)42,43). The other proposed mechanism for VO2RD related to microvascular changes and/or peripheral blood flow leading to oxygen debt within the skeletal muscles.…”

“…In adults, VO2RD is often correlated with V̇O 2peak ; however, this correlation and its potential as a marker for outcomes in children and adolescents is less clear. Only two of the four studies in the Fontan population show a negative correlation between V̇O 2peak and VO2RD, where higher V̇O 2peak related with lower VO2RD (20,27). Other studies have observed a significant correlation between V̇O 2peak and VO2RD in children and adolescents with other forms of CHD (22,26,34) and other chest diseases, such as cystic fibrosis (35).…”

“…Postexercise oxygen uptake recovery delay (VO2RD) is an index of impaired cardiac reserve representing the interval between exercise termination at VO 2peak and the rate of decline in VO 2 during exercise recovery. In healthy populations, VO 2 is known to decline and recover rapidly at termination of exercise, represented by a short VO2RD (20)(21)(22).…”