A	Area (m2)
$AVA$	aortic valve area (cm2)
B	Exergy of the control volume (J)
$\dot{B}$	Exergy rate (W)
b	Specific exergy (kJ/kg)
E	Energy of the control volume (J)
$EOA$	Effective orifice area (cm2)
g	Gravitational acceleration (m/s2)
$\dot{H}$	Enthalpy rate (W)
h	Specific enthalpy (kJ/kg)
$\dot{m}$	Mass flow rate (kg/s)
$\dot{M}$	Energy metabolism (W)
$MVA$	Mitral valve area (cm2)
P	Pressure (Pa, mmHg)
$\dot{Q}$	Heat transfer rate (W)
$RQ$	Respiratory quotient (-)
$\dot{S}$	Entropy rate (W/K)
s	Specific entropy (kJ/kgK)
T	Temperature (°C)
t	Time (s)
$TPG$	Transvalvular pressure gradient ($mm$)
$\dot{V}$	Volumetric flow rate (m3/s)
V	Volume (m3)
v	Specific volume (m3/s)
greek letters:
$\eta$	Efficiency (-)
$\rho$	Specific mass (kg/m3)
subscripts:
0	Reference state
$bl$	Blood
$CV$	Control volume
d	Destroyed
e	Exit
$Heart$	Associated with the heart
i	Inlet
M	Metabolic
$Q_M$	Associated with the metabolic heat
$syst$	systolic
$valve$	Associated with the valve