Table I.

Properties of the 10 mature rabbits as follows: age, weight (W), crown-to-rump length (C-R), heart rate (HR), cardiac output (CO), mean pressure (P_m), pulse pressure (PP), outflow pressure (P_out), time constant of the decline in pressure during diastole () and pulse wave velocity at the aortic root calculated using the foot-to-foot method (c_ff), the traditional PU–loop (c_PU) and the modified –loop (), with ρ = 1,015 kg m ^− 3 in both loop methods.

Rabbit	Age	W	C-R	HR	CO	Pm	PP	Pout		cff	cPU
No.	(days)	(kg)	(cm)	(beat/s)	(ml/s)	(kPa)	(kPa)	(kPa)	(s)	(m/s)	(m/s)	(m/s)
1	100	3.22	43	3.7	3.1	8.1	2.9	3.0	0.32	4.3	3.9	4.3
2	114	3.20	41	2.9	2.3	5.2	2.8	2.2	0.37	4.5	4.2	4.4
3	93	2.55	40	4.0	2.4	6.9	2.8	2.3	0.28	4.7	4.2	4.6
4	72	2.29	40	4.5	2.6	6.2	2.2	2.2	0.28	5.1	4.6	5.1
5	92	2.67	40	4.7	4.2	7.7	3.4	2.8	0.18	4.5	4.0	4.5
6	136	2.54	42	3.1	4.1	6.0	2.4	1.3	0.28	3.5	3.0	3.4
7	143	3.00	41	3.4	4.9	8.6	3.1	2.3	0.30	4.5	4.2	4.6
8	114	3.26	43	3.6	4.0	10.5	2.8	4.5	0.32	4.4	4.0	4.4
9	159	3.48	45	4.7	4.4	8.1	2.6	1.7	0.34	4.3	3.9	4.3
10	133	3.13	41	5.2	5.4	8.5	3.0	3.1	0.26	3.9	3.5	3.8
Mean	116	2.93	41.6	4.0	3.7	7.6	2.8	2.5	0.29	4.37	3.96	4.34
SEM	9	0.12	0.5	0.2	0.3	0.5	0.1	0.3	0.02	0.13	0.14	0.14

We calculated P_out and by fitting an exponential function of the form given by Equation (19) to the decline in pressure during diastole, with T₀ the time at the beginning of the exponential fit. The last two rows are mean and standard error of the mean (SEM) for all ten rabbits.