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Hemodynamic characteristics of patients screened with duplex ultrasound.
| MEAN PSV (cm/s) | MEAN PSV WITH INSP. (cm/s) | MEAN CHANGE IN PSV WITH RESPIRATION (cm/s) | MEAN PSV:AORTIC RATIO | |
|---|---|---|---|---|
| Pre-op | 381±23* | 197±11* | 180±16* | 2.2±0.14* |
| Intra-op | 212±8 | 222±12 | 4±5 | 1.2±0.05 |
| Post-op | 235±11 | 180±7 | 46±9 | 1.4±0.06 |
p<0.001 when pre-operative parameters were compared with post-operative parameters.
(PSV: Peak systolic velocity; EDV: end diastolic velocity; Insp: Inspiration; cm/s: centimeter/second)
