. Author manuscript; available in PMC: 2019 Mar 1.

Published in final edited form as: J Cyst Fibros. 2017 Oct 12;17(2):256–263. doi: 10.1016/j.jcf.2017.08.015

Table 2.

Blood flow variables at rest and during exercise at 20, 40, and 60% intensity.

	Baseline		20%		40%		60%

Variable	Controls	CF	Controls	CF	Controls	CF	Controls	CF

Diameter (cm)	0.28 ± 0.05	0.28 ± 0.05	0.28 ± 0.05	0.27 ± 0.05	0.28 ± 0.05	0.27 ± 0.05	0.28 ± 0.05	0.27 ± 0.05
Mean velocity (cm/s)	9.3 ± 4.4	5.8 ± 1.4	8.6 ± 4.6	7.8 ± 2.2	15.3 ± 9.6^*	10.2 ± 3.7^*	18.9 ± 8.4^*	13.7 ± 4.4^*
Blood flow (ml/min)	34.4 ± 19.1	21.8 ± 9.3	29.0 ± 13.4	28.0 ± 13.2	54.5 ± 35.4^*	36.1 ± 15.8^*	71.4 ± 38.1^†	49.4 ± 19.2^†
Retrograde blood flow (ml/min)	2.8 ± 4.1	4.4 ± 6.8	10.3 ± 12.6^‡	11.0 ± 9.4^‡	12.5 ± 15.4^*	19.8 ± 15.8^*	14.3 ± 17.7^*	23.6 ± 17.1^*
Antegrade blood flow (ml/min)	37.0 ± 20.5	26.3 ± 12.1	38.7 ± 17.6^‡	39.8 ± 17.3^‡	63.9 ± 32.8^*	56.0 ± 25.2^*	80.2 ± 37.7^†	73.1 ± 29.8^†
Mean shear rate (s⁻¹)	171 ± 54	277 ± 141	231 ± 62	266 ± 166	305 ± 131^*	458 ± 297^*	412 ± 166^†	554 ± 254^†
Heart rate (bpm)	82 ± 10	76 ± 11	100 ± 9	101 ± 11	118 ± 16	127 ± 16	139 ± 19	157 ± 17^#

Values are mean ± SD.

significantly higher versus baseline and 20% intensity, independent of group (P<0.05);

^†

significantly higher versus baseline, 20%, and 40% intensity, independent of group (P<0.05);

^‡

significantly higher versus baseline, independent of group (P<0.01);

significantly higher versus controls within same level of intensity (P=0.017).