a	constant of curvilinearity
b	constant of square regression
bpm	beats per minute
BW	body weight
CO	cardiac output
dP/dt max	maximum rate of pressure change
dP/dt min	minimum rate of diastolic pressure change
dp/dV	dp/dV = slope of EDPVR and index of stiffness
Ea	arterial elastance
EDPVR	end-diastolic pressure–volume relationship
EDV	end-diastolic volume
EF	ejection fraction
Ees	end-systolic elastance
ESPVR	end-systolic pressure–volume relationship
ESV	end-systolic volume
HR	heart rate
k2	constant
mmHg	millimeter mercury
MRI	magnetic resonance imaging
PE	potential energy
PRSW	preload recruitable stroke work
PVA	pressure–volume area
PV loop	pressure–volume loop
r2	coefficient of determination
SV	stroke volume
SW	stroke work
Tau	isovolumic relaxation constant