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exam 2
heart and pressure
12
Physiology
Undergraduate 3
03/22/2011

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Term
Systolic Pressure
Definition
maximum arterial pressure during contraction of left ventricle. (typically 120 mm HG, first reading)
Term
Diastolic Pressure
Definition
the minimum arterial pressure during relaxation and dilation of the ventricles of the heart when the ventricles fill with blood. (typically 80 mm hg)
Term
MAP (Mean Arterial Pressure)
Definition
average arterial pressure during a single cardiac cycle.
Term
Pulse Pressure
Definition
systolic pressure minus diastolic pressure.
Term
Filtration Pressure
Definition
NFP = capillary pressure (Pc)- Interstitial Fluid pressure (Pif) - Plasma colloid osmotic pressure (Ilp) + Interstitial Fluid colloid osmotic pressure (Ilif)
Term
Venous Pressure
Definition
Pressure in the right atrium
Term
SA node
Definition
impulse generating located in right atrium of heart. (pacemaker)
Term
AV node
Definition
electrical relay system between atria and ventricles
Term
AV bundle
Definition
atypical cardiac muscles with few contractile units
Term
purkinje fibers
Definition
myocardial fibers that conduct an electrical impulse enabling the heart to contract in a coordinated fashion
Term
cardiac output
Definition
measure of blood pumped by ventricles each minute
Term
blood flow
Definition
flow = change in pressure/resistance
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