Doppler echocardiography demonstrated higher test-retest reproducibility for measuring cardiac output than CO2-rebreathing in prepubertal children at rest and during exercise.
Observational (n=14)
Does Doppler echocardiography provide better test-retest reproducibility than CO2-rebreathing for measuring cardiac output in prepubertal children?
Doppler echocardiography is more reproducible than CO2-rebreathing for measuring cardiac output in prepubertal children during exercise, making it the preferred method for detecting changes in cardiac output.
The aim of this study was to examine the reproducibility of cardiac output (Q) measured by Doppler echocardiography and CO 2 -rebreathing in prepubertal children during exercise. Fourteen healthy children (8 girls and 6 boys aged 10.9 ± 0.9 years) underwent a progressive maximum upright cycle test until exhaustion on two separate occasions (1 week apart). Q was determined successively by the two methods at rest and during the final minutes of each workload. The reproducibility of the Doppler method was higher than the reproducibility of the CO 2 -rebreathing method, both at rest and during exercise. Moreover, this reproducibility was lower during high intensity exercise whatever the method used. On account of its high reproducibility, Doppler echocardiography should be preferentially used to detect changes in Q as a result of an exercise training intervention in prepubertal children.
Nottin et al. (Wed,) conducted a observational in Healthy (n=14). Doppler echocardiography vs. CO2-rebreathing was evaluated on Test-retest reproducibility of cardiac output (Q). Doppler echocardiography demonstrated higher test-retest reproducibility for measuring cardiac output than CO2-rebreathing in prepubertal children at rest and during exercise.