Items | n | Mean ± SD |
|---|
CCCT(1/4)* | 67 | 6.36 ± 3.01 |
CCCT(1)* | 33 | 10.36 ± 4.2 |
S1/S2 | 140 | 1.89 ± 0.94 |
T1/M1 | 144 | 1.44 ± 0.99 |
D/S | 172 | 1.68 ± 0.27 |
- * p < 0.01; N: number of subjects; CCCT = cardiac contractility change trend; CCCT(1) = CCCT for completing the whole workload (7000 J); CCCT(1/4) = CCCT for completing one-fourth of the whole workload (1750 J); S1/S2 = the ratio of the amplitude of the first heart sound to the amplitude of the second heart sound; T1/M1 = the ratio of the amplitude of the first heart sound at the tricuspid valve auscultation area to the amplitude of the first heart sound at the mitral auscultation area; D/S = the ratio of diastolic to systolic duration.
