Changes in echocardiographic measurements during preload altering manoeuvres
| Variable | Baseline | Stage 1 | Stage 2 | Stage 3 |
|---|---|---|---|---|
| Values are mean (SD). | ||||
| p Values: stages 1–3 v baseline: *p=0.001; †p=0.003; ‡p=0.01; §p=NS (p>0.05). | ||||
| Stage 1, Trendelenberg manoeuvre; stage 2, reverse Trendelenberg manoeuvre; stage 3, amyl nitrate inhalation. | ||||
| E, left ventricular early mitral inflow velocity; EDTV, early diastolic velocity; LVEDV, left ventricular end diastolic volume. | ||||
| LVEDV (ml)* | 198.6 (132.2) | 242.2 (186.2) | 212.1 (163.0) | 188.1 (132.9) |
| Left atrial area (mm2)† | 22.4 (8.6) | 23.9 (10.0) | 21.7 (9.6) | 20.1 (7.7) |
| E wave (cm/s)‡ | 82.4 (33.1) | 84.6 (32.2) | 71.9 (25.9) | 72.8 (20.2) |
| EDTV (cm/s)§ | 10.3 (3.5) | 10.7 (3.1) | 10.7 (3.4) | 11.1 (3.7) |
| Systolic blood pressure (mm Hg)* | 126.4 (18.6) | 122.9 (16.9) | 118.1 (21.0) | 103.2 (21.5) |