Table 1. Least square mean (95% CI) obtained from linear mixed model for hemodynamic data before (baseline) and each times point during acute volume loading in 6 healthy beagles.
| Variables | Baseline | 15 min | 30 min | 45 min | 60 min | 75 min | 90 min |
|---|---|---|---|---|---|---|---|
| MBP | 55 (48–63) | 55 (48–62) | 57 (49–64) | 58 (51–65) | 60 (53–67) | 60 (53–67) | 59 (52–67) |
| Heart rate (beats/min) | 110 (103–117) | 101 (94–108)a) | 109 (102–116) | 110 (103–117) | 113 (106–120) | 114 (107–121) | 109 (102–116) |
| PAPm (mmHg) | 9.5 (7.1–11.9) | 12.7 (10.2–15.1)a) | 15 (12.6–17.4)a) | 16.3 (13.9–18.8)a) | 17.3 (14.9–19.8)a) | 17.8 (15.4–20.3)a) | 17.5 (15.1–19.9)a) |
| PCWPm (mmHg) | 3.3 (1.1–5.6) | 8 (5.8–10.2)a) | 10.3 (8.1–12.6)a) | 12 (9.8–14.2)a) | 12.7 (10.4–14.9)a) | 13.3 (11.1–15.6)a) | 14 (11.8–16.2)a) |
| RAPm (mmHg) | 0.3 (−1.1–1.7) | 5.5 (4.1–6.9)a) | 6.5 (5.1–7.9)a) | 7.2 (5.8–8.6)a) | 7.5 (6.1–8.9)a) | 8.2 (6.8–9.6)a) | 8.3 (6.9–9.7)a) |
| Cardiac output (l/min) | 2.1 (1.8–2.4) | 2.6 (2.3–2.8)a) | 2.8 (2.5–3.1)a) | 2.9 (2.7–3.2)a) | 3 (2.7–3.3)a) | 3.1 (2.8–3.4)a) | 3.1 (2.8–3.4)a) |
| Stroke volume (ml) | 19 (17–22) | 25 (23–28)a) | 26 (24–28)a) | 27 (24–29)a) | 27 (24–29)a) | 28 (25–30)a) | 28 (26–31)a) |
a) Value differs significantly (P<0.05) from corresponding baseline value. PAP=Pulmonary arterial blood pressure. RAP=Right atrial blood pressure. PCWP=Pulmonary capillary wedge pressure. MAP=Mean arterial blood pressure as measured via arterial catheterization.