Age, heart rate, aqueductal flow, and anatomic features and peak transmantle pressuresa
| Total (n = 77) | Female (n = 49) | Male (n = 28) | Sex (P Value) | |
|---|---|---|---|---|
| Age (yr) | 69 (SD, 14) | 72 (SD, 13) | 65 (SD, 16) | .114 |
| Heart rate (BPM) | 64 (SD, 9) | 63 (SD, 7) | 66 (SD, 11) | .305 |
| Flow and anatomic features | ||||
| Area (mm2) | 3.15 (SD, 1.03) | 2.90 (SD, 0.88) | 3.58 (SD, 1.13) | .016 |
| Stroke volume (μl) | 40 (SD, 20) | 40 (SD, 20) | 42 (SD, 20) | .571 |
| Length (mm) | 17.3 (SD, 2.8) | 16.9 (SD, 2.8) | 18.0 (SD, 2.5) | .065 |
| Peak transmantle pressure | ||||
| Pressure+ (Pa) | 14.44 (SD, 6.49) | 14.54 (SD, 6.13) | 14.25 (SD, 7.18) | .564 |
| Pressure− (Pa) | 6.94 (SD, 2.82) | 7.02 (SD, 2.69) | 6.79 (SD, 3.07) | .586 |
Note:—BPM indicates beats per minute; +, peak positive pressure during caudal flow; −, peak negative pressure during rostral flow.
↵a Data are means unless otherwise indicated.