Table 5.
Intra-class correlation coefficients (ICC) and Bland-Altman results between metrics obtained from baseline ventricular and arterial beat-by-beat data in rats (n = 30).
Metrics | ICC | Bland-Altman, 95% LOA | ||||
---|---|---|---|---|---|---|
| ||||||
ICC | Size | 95% CI | P | Lower | Upper | |
LVdP/dtmax-EDV vs. ARTdP/dtmax-EDV | 0.838* | Good | 0.359–0.941 | < 0.001 | −16.575 | 42.537 |
LVdP/dtmax-EDV vs. ARTESP-EDV | 0.948* | Excellent | 0.891–0.975 | < 0.001 | −0.881 | 0.881 |
Pmax-EDV vs. ARTdP/dtmax-EDV | 0.913* | Excellent | 0.818–0.959 | < 0.001 | −1.122 | 1.122 |
Pmax-EDV vs. ARTESP-EDV | 0.993* | Excellent | 0.986–0.997 | < 0.001 | −0.017 | 0.214 |
LVESP-EDV vs. ARTdP/dtmax-EDV | 0.905 | Excellent | 0.800–0.955 | < 0.001 | −1.193 | 1.193 |
LVESP-EDV vs. ARTESP-EDV | 0.985* | Excellent | 0.965–0.993 | < 0.001 | −0.115 | 0.074 |
Ees(SB1) vs. Ees(SB2) | 0.993 | Excellent | 0.984–0.997 | < 0.001 | −0.651 | 0.448 |
LVEFEA1 vs. LVEFEA2 | 0.992* | Excellent | 0.980–0.996 | < 0.001 | −8.384 | 5.332 |
LVdP/dtmax vs. ARTdP/dtmax | 0.311* | Poor | −0.213–0.648 | 0.027 | −1814.404 | 7369.039 |
LVdP/dtmax vs. ARTESP | 0.654* | Moderate | 0.262–0.836 | 0.003 | −2.004 | 2.004 |
Pmax vs. ARTdP/dtmax | 0.541* | Moderate | 0.019–0.784 | 0.022 | −2.211 | 2.211 |
Pmax vs. ARTESP | 0.582* | Moderate | −0.099–0.877 | < 0.001 | 6.699 | 31.531 |
LVESP vs. ARTESP | 0.896* | Good | 0.775–0.951 | < 0.001 | −20.356 | 13.757 |
LVdP/dtmax-EDV, the maximal rate of rise of the left ventricular (LV) pressure (LVdP/dtmax) and end-diastolic volume (EDV) ratio; ARTdP/dtmax-EDV, the maximal rate of rise of the arterial pressure (ARTdP/dtmax) and EDV ratio; Pmax-EDV, maximal pressure (Pmax) and EDV ratio; ARTESP-EDV, arterial ESP (ARTESP, 0.9 × systolic blood pressure (SBP) and EDV ratio; LVESP-EDV, LV ESP (LVESP) and EDV ratio; Ees(SB1), LVESP and end-systolic volume (ESV) ratio; Ees(SB2), ARTESP and ESV ratio; LVEFEA1, afterload adjusted left ventricular ejection fraction using ventricular data; LVEFEA2, afterload adjusted left ventricular ejection fraction using arterial data; LOA, limit of agreement.
significant observation