Correlation of peak positive and negative transmantle pressure with age, heart rate, aqueductal area, stroke volume, and aqueductal length
| Pressure+ (Pa) | Pressure− (Pa) | |||
|---|---|---|---|---|
| Correlation Coefficient | P | Correlation Coefficient | P | |
| Age (yr) | 0.33 | .004 | 0.18 | .107 |
| Heart rate (BPM) | −0.12 | .284 | 0.11 | .343 |
| Area (mm2) | −0.19 | .093 | −0.28 | .013 |
| Stroke volume (μl) | 0.51 | <.001 | 0.28 | .014 |
| Length (mm) | 0.33 | .004 | 0.37 | .001 |
Note:—BPM indicates beats per minute; +, peak positive pressure during caudal flow; −, peak negative pressure during rostral flow.