Hemodynamic
terminology

Cardiac output &
cardiac index

Cardiac output:
volume of blood
in liters pumped
by the heart in 1
minute

Cardiac index:
measurement of
CO adjusted for
body surface area

Stroke Volume:
volume ejected w
each beat

Stroke Volume
index: measurement
of SV adjusted for BSA

Systemic Vascular
resistance: opposition
encountered by the left
ventricle

Pulmonary vascular
resistance (PVR):
opposition encountered
by the right ventricle

Preload, afterload,
& contractility
determine SV(&
thus CO and BP)

Volume within the
ventricle @ the end
of diastole

left-ventricular
end-diastolic
pressure:Left
ventricular preload

PAWP-measurement
of pulmonary capillary
pressure, reflects left
ventricular end-diastolic
pressure

Frank-Starling's
law: the ⇧ a
myocardial fiber
is stretched, the
during filling, the
⇧ it shortens
during systole &
⇧ the contraction
force

Forces opposing
ventricular ejection

systemic arterial
pressure

mass & density
of blood moves

CO can be restored
& myocardial 02 needs
⇓ by ⇓ afterload

Vasodilators
can ⇓ afterload

SVR & PVR
reflect afterload

Strength of
contraction

⇧ when preload
is un▲ yet ♡ contracts
⇧ forcefully