Table 5 Relationship between CPET and echocardiographic variables with NYHA class
From: Exercise capacity in moderate aortic stenosis: a cardiopulmonary stress echocardiography study
Parameter (AS patients only) | NYHA I n = 14 | NYHA II n= 11 | p value |
|---|---|---|---|
Peak VO2 (in patients with RER > 1.1) | 20.2± 4.7 | 19.2 ± 3.8 | 0.585 |
% predicted VO2 in patients with RER > 1.1 | 75 ± 14 | 79 ± 17 | 0.452 |
VE/VCO2 slope | 29.9 ± 10 | 32.6 ± 6.8 | 0.442 |
OUES | 1808 ± 490 | 1567 ± 417 | 0.227 |
% predicted OUES | 80 ± 15 | 76 ± 15 | 0.542 |
Oxygen pulse | 10.9 ± 3.1 | 11 ± 3.6 | 0.936 |
% predicted oxygen pulse | 89 ± 15 | 88 ± 21 | 0.956 |
PETCO2 | 34.1 ± 4.2 | 33.3 ± 4.8 | 0.654 |
VO2 at AT | 15.3 ± 3.4 | 12.3 ± 3.2 | 0.020 |
AVVmax | 3.5 ± 0.3 | 3.4 ± 0.2 | 0.201 |
Mean gradient | 28 ± 5 | 28 ± 4 | 0.933 |
AVA | 1.2 ± 0.2 | 1.1 ± 0.2 | 0.300 |
Average S’ rest | 6.9 ± 2.5 | 5.5 ± 1.8 | 0.126 |
Average S’ stress | 10.4 ± 2.7 | 7.4 ± 1.8 | 0.005 |
Δ S’ | 3.3 ± 1.7 | 1.7 ± 2.2 | 0.056 |
GLS rest | 15.8 ± 3.4 | 14.3 ± 3.1 | 0.510 |
GLS stress | 16.9 ± 2.2 | 17.1 ± 3.4 | 0.901 |
Δ GLS | 4.2 ± 2.5 | 2.8 ± 3.7 | 0.457 |