Right ventricular stiffness constant as a predictor of postoperative hemodynamics in patients with hypoplastic right ventricle: a theoretical analysis

Table 1 Parameters used in modeling

Heart rate (HR), beats/min	75
Duration of cardiac cycle (T _c), ms	800
Time advance of atrial systole (DT), ms	16
Total stressed blood volume (V _s), ml	750	(control only)

	LV	RV	LA	RA
Time to end systole (T _es), ms	200	200	120	120
End-systolic elastance (E _es), mmHg/ml	3.0	0.7	0.5	0.5
Scaling factor of EDPVR (A), mmHg	0.35	0.35	0.06	0.06
Exponent scaling factor for EDPVR (B), ml⁻¹	0.033	0.023	0.264	0.264
Unstressed volume (V ₀), ml	0	0	5	5

	Aortic	Pulmonary	Mitral	Tricuspid
Valvular resistance (forward), (mmHg s)/ml	0.001	0.001	0.001	0.001

	Systemic		Pulmonary (p)
	Superior (ss)	Inferior (si)	Pulmonary (p)
Arterial resistance (R _a), (mmHg s)/ml	2.25	1.5	0.03
Characteristic impedance (R _c), (mmHg s)/ml	0.075	0.05	0.02
Venous resistance (R _v), (mmHg s)/ml	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

LV Left ventricle, RV right ventricle, LA left atrium, RA right atrium, EDPVR end-diastolic pressure–volume relationship

ISSN: 1880-6562