Blood Velocity and Pressure - The Cardiovascular System

When is blood moving at the highest velocity?

as the blood leaves the left ventricle

The _____ the surface area, the _____ the blood flow velocity, the _____ the O2 exchange.

great; slower; better

What is SBP?

pressure in arteries during heart contraction

What is DBP?

pressure in arteries during heart relaxation

How is BP affected when doing aerobic exercise?

SBP increases
DBP stays consistent or decreases

How is BP affected when doing resistance exercise?

SBP and DBP increase

What does SBP provide us an estimate of?

the work of the heart and the strain against the arterial walls during ventricular contraction

How do you calculate MAP?

HR x SV x TPR
DBP + [0.333(SBP-DBP)]

What is Rate-Pressure Product?

an estimate of myocardial workload and resulting oxygen consumption

How do you calculate RPP?

SBP x HR

What is VO2 max?

the greatest amount of oxygen that can be used at the cellular level for the entire body

What is EDV?

volume of blood in the heart at the end of diastole

What is ESV?

the volume of blood in the heart at the end of systole

What is SV?

the difference between EDV and ESV, volume of blood that leaves the heart

What is EF?

% of EDV pumped with each beat, % of blood that leaves the heart

How do you calculate EF?

SV / EDV x 100

[(EDV-ESV) / EDV] x 100

What is Cardiac Output?

amount of blood moved by the heart per minute

How do you calculate Q?

SV x HR
(EDV-ESV) x HR

What is the Fick EQ?

HR x SV x A-V O2 diff

When does the great increase in SV occur?

transition from rest to exercise

When a patient in on a CA++ blocker what happens?

SV will increase slightly and TPR will decrease because it will not allow contraction/constriction to occur

When SBP does not increase with exercise but HR does, what can we assume?

issue with SV

When SBP does not go up with exercise, what can we assume?

not enough blood is being pumped to supply to body