作者：Juana Romero 9 年以前
629
Hemodynamic Terminology
Hemodynamic
terminology
Contractility
Strength of
contraction
⇧ when preload
is un▲ yet ♡ contracts
⇧ forcefully
Vascular
resistance
SVR & PVR
reflect afterload
Afterload
CO can be restored
& myocardial 02 needs
⇓ by ⇓ afterload
Vasodilators
can ⇓ afterload
Forces opposing
ventricular ejection
mass & density
of blood moves
systemic arterial
pressure
Preload
Frank-Starling's
law: the ⇧ a
myocardial fiber
is stretched, the
during filling, the
⇧ it shortens
during systole &
⇧ the contraction
force
PAWP-measurement
of pulmonary capillary
pressure, reflects left
ventricular end-diastolic
pressure
left-ventricular
end-diastolic
pressure:Left
ventricular preload
Volume within the
ventricle @ the end
of diastole
Cardiac output &
cardiac index
Preload, afterload,
& contractility
determine SV(&
thus CO and BP)
Pulmonary vascular
resistance (PVR):
opposition encountered
by the right ventricle
Systemic Vascular
resistance: opposition
encountered by the left
ventricle
Stroke Volume
index: measurement
of SV adjusted for BSA
Stroke Volume:
volume ejected w
each beat
Cardiac index:
measurement of
CO adjusted for
body surface area
Cardiac output:
volume of blood
in liters pumped
by the heart in 1
minute
