Kadariya D; Canada JM; Del Buono MG; van Wezenbeek; J Tchoukina; Arena R; Van Tassell B; Abbate A
Journal of cardiopulmonary rehabilitation and prevention [J Cardiopulm Rehabil Prev] 2020 Apr 16. Date of Electronic Publication: 2020 Apr 16.
Purpose: Peak oxygen uptake recovery delay (VO2peakRD), measured as the time until post-exercise oxygen uptake (VO2) decreases below VO2peak following maximal cardiopulmonary exercise testing (CPX), has been recognized as an abnormal response, associated with reduced cardiac output reserve during exercise in patients with heart failure (HF). In the current study we examined the association of VO2peakRD during routine CPX testing of patients with symptomatic HF across a wide range of left ventricular ejection fraction (LVEF) values with clinical biomarkers.
Methods: In this retrospective study, 80 clinically stable symptomatic HF patients across a wide range of LVEF at our institution were evaluated that put forth a minimally acceptable effort during CPX testing (respiratory exchange ratio ≥ 1.00). The VO2peakRD was measured in 10-sec intervals following maximal CPX testing. Markers of elevated cardiac filling pressures (N-terminal pro-brain natriuretic peptide [NTproBNP] and echocardio-Doppler E/e’) and other key CPX parameters were explored for their association with VO2peakRD.
Results: The mean VO2peakRD and VO2peak were 10 (interquartile range 10, 40) sec and 13.9 (11.6, 16.4) mL·kg. min, respectively. VO2peakRD demonstrated a positive linear trend with serum NTproBNP levels and E/e’ (TJT = 1239.500, z = 2.634, P < .01; TJT = 1081.000, z = 2.046, P = .04, respectively).
Conclusion: Prolonged VO2peakRD following exercise is associated with markers of greater disease severity in patients with HF.