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

Published in final edited form as: JACC Heart Fail. 2018 Mar 7;6(4):329–339. doi: 10.1016/j.jchf.2018.01.007

Table 4.

VO₂ Recovery Delay Predicts Cardiovascular Transplant-Free Survival in HFrEF Cohort 2 (n=106) Independently of Other Prognostic CPET Variables

Parameter	Cox Hazard Ratio	95% Confidence Interval	P-value
VO₂RD (for every 10 sec increase)	1.37	1.10 – 1.71	0.005
VE/VCO₂ Slope (for every 1 increase)	1.04	0.97 – 1.11	0.271
OUES (for every 0.1 increase)	1.11	1.01 – 1.21	0.023
HR recovery @ 2min (for every 5 BPM)	0.77	0.62 – 0.95	0.018
VO₂ percent predicted (for every 1% increase)	0.95	0.92 – 0.99	0.006

VO₂RD, indicates VO₂ recovery delay; OUES, oxygen uptake efficiency slope; HR, heart rate