PhysLab Final Cardio
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Represents the driving force that pushes the blood throughout the systemic circulation
Mean arterial pressure (MAP)
DBP + [(SBP-DBP)/3]
Pressure in the veins which drives blood flow into the heart
Rate at which a ventricle pumps blood in L/min
Cardiac Output (Q)
Cardiac Output (Q) (L/min) =
HR x SV
Volume of blood ejected from one ventricle with each beat
Normal resting Q for adult at rest
Front of arm opposite the elbow where u can feel pulse which is where u place stethoscope. What is the artery called?
- Antecubital area
- brachial artery
When taking BP, listen for the ___ sounds. First thud represents ___. Fifth thud represents ___.
_____ = slow HR
_____ = fast HR
The ____ is activated when BP is increased or decreased
baroreceptors are located in (2) and respond to ___
- carotid bodies
- chgs in BP
When standing quickly, gravity pulls blood towards feet, resulting in a ___ in BP b/c of ___ in venous return to heart. The baroreceptors respond by ___ HR and ___ TPR, and triggering a ____ in sympathetic activity. This causes BP to ___.
- drop; decreased
- increase; increase
Measure of the amount of O2 extracted by the tissues from blood during one trip around systemic circulation
Arteriovenous O2 difference (a-v O2 diff)
What affect does heavy exercise elicit on the a-v O2 difference and why does this occur?
Heavy exercise causes the a-v O2 difference to increase because the muscles must extract more oxygen from the blood within the veins.
Which type of exercise should be prescribed to a
person with congestive heart failure?
Dynamic exercise would be recommended for someone with CHF because there would be less strain on the heart due to a lower cardiac output and a higher venous return than during static exercise.
The larger the blood volume of LV at the end of diastole the larger the volume of blood pumped out per beat. (theory)
what is the importance of FrankStarling Law?
- Adjusts stroke volume so that Q matches venous return
- Inflow = outflow
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