Table 2.
Aortic diameter and flow rate.
| Young | Old | p-value | |
|---|---|---|---|
| (n = 22) | (n = 20) | ||
| Heart rate, bpm | 63.4 ± 10.4 | 70.5 ± 12.9 | 0.053 |
| Stroke volume, mL | 68.9 ± 29.8 | 59.2 ± 23.5 | 0.254 |
| CARDIAC OUTPUT, L/min | |||
| CO | 4.3 ± 1.8 | 4.2 ± 1.9 | 0.842 |
| MAXIMUM FLOW RATE, L/m | |||
| Qmax, AAo | 23.5 ± 6.1 | 20.5 ± 4.4 | 0.078 |
| Qmax, DAo | 17.9 ± 3.1 | 15.8 ± 3.5 | 0.045 |
| Qmax, SAA | 18.6 ± 3.3 | 16.4 ± 3.2 | 0.035 |
| Qmax, IAA | 9.9 ± 2.4 | 9.1 ± 2.7 | 0.308 |
| DIAMETER, mm | |||
| DAAo | 30.0 ± 3.5 | 36.4 ± 3.4* | < 0.001 |
| DDAo | 25.3 ± 2.1 | 31.4 ± 2.4* | < 0.001 |
| DSAA | 22.3 ± 2.2 | 28.8 ± 2.5* | < 0.001 |
| DIAA | 19.4 ± 2.0 | 22.2 ± 3.5* | < 0.001 |
| MAXIMUM REYNOLDS NUMBER | |||
| Remax, AAo | 4408 ± 1084 | 3177 ± 660* | < 0.001 |
| Remax, DAo | 3987 ± 596 | 2838 ± 568* | < 0.001 |
| Remax, SAA | 4707 ± 718 | 3209 ± 522* | < 0.001 |
| Remax, IAA | 2861 ± 596 | 2289 ± 523 | 0.002 |
*
Indicates a statistically significant difference (p < 0.001) between the young and old groups. AAo, ascending aorta; DAo, descending aorta; SAA, suprarenal abdominal aorta; IAA, infrarenal abdominal aorta; CO, cardiac output; Re, Reynolds number.