Skip to main content
. Author manuscript; available in PMC: 2023 Nov 1.
Published in final edited form as: J Physiol. 2022 Oct 5;600(22):4779–4806. doi: 10.1113/JP283319

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