Partial cavopulmonary assist from the inferior vena cava to the pulmonary artery improves hemodynamics in failing Fontan circulation: a theoretical analysis

Table 1 Parameters used in the Fontan model

Heart rate (HR), beats/min	75
Duration of cardiac cycle (T _c), ms	800
Time advance of atrial systole, ms	16

	SV	SA
Time to end systole (T _es), ms	200	120
End-systolic elastance (E _es), mmHg/ml	3.0	0.5
Scaling factor of EDPVR (A), mmHg	0.35	0.06
Exponent for EDPVR (B), ml⁻¹	0.033	0.264
Unstressed volume (V ₀), ml	0	5

	Aortic	Atrioventricular
Valvular resistance (forward), mmHg s ml⁻¹	0.001	0.001

	Systemic		Pulmonary (p)
	Superior (s, s)	Inferior (s, i)	Pulmonary (p)
Arterial resistance (R _a), mmHg s ml⁻¹	2.25	1.5	0.03
Characteristic impedance (R _c), mmHg s ml⁻¹	0.075	0.05	0.02
Venous resistance (R _v), mmHg s ml⁻¹	0.0375	0.025	0.015
Arterial capacitance (C _a), ml/mmHg	0.528	0.792	13
Venous capacitance (C _v), ml/mmHg	28	42	8

SV single ventricle, SA single atrium, EDPVR end-diastolic pressure–volume relation

ISSN: 1880-6562