Table 2.
Hemodynamic Responses to Standing
| Sitting | YOUNG | OLD |
|---|---|---|
| MAP, mmHg | 88(17) | 85(12) |
| MCA MFV, cm/s | 70(14)† | 50(18)*† |
| PCA MFV, cm/s | 40(14) | 36(14) |
| MCA CVR, mmHg/cm/s | 1.3(0.5)† | 2.1(1.2)* |
| PCA CVR, mmHg/cm/s | 2.5(0.9) | 2.8(1.5) |
| HR, bpm | 70(12) | 63(4) |
| Standing | ||
| MAP, mmHg | 70(17) | 59(13) |
| MCA MFV, cm/s | 57(14)† | 43(18)† |
| PCA MFV, cm/s | 33(15) | 30(16) |
| MCA CVR, mmHg/cm/s | 1.3(0.5)† | 1.7(1.0) |
| PCA CVR, mmHg/cm/s | 2.4(0.8) | 2.5(1.3) |
| HR, bpm | 94(9) | 77(7)* |
| Hemodynamic Response | ||
| % Change MAP | −21(7) | −31(11)* |
| % Change MCA MFV | −20(7) | −16(12)*† |
| % Change PCA MFV | −18(13) | −19(15) |
| % Change MCA CVR | −0.8(10) | −17(8)*† |
| % Change PCA CVR | −2.0(16) | −13(9)* |
| Change HR | 24(8) | 15(5)* |
| Rate of Recovery (RoR) | ||
| MCA ROR (sec−1) | 0.27(0.39) | 0.12(0.05) |
| PCA ROR (sec−1) | 0.29(0.33) | 0.13(0.05) |
All values represent Means (SD).
*
Significant differences between young and old.
†
Significant differences between MCA and PCA.