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32 Cards in this Set
- Front
- Back
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What effect does Atropine have on Heart rate?
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Increased HR
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What effect does increasing aortic Blood pressure have on stroke volume?
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SV is reduced
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Stroke work = ____x____
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Stroke work = SV x Arterial BP
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what effect does lowering aortic BP have on Stroke volume?
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SV is increased
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What is positive ionotropic effect (ionotropism)?
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increases contractility of heart
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afterload is ____ blood pressure
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aortic
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a positive ionotropic effect would shift ventricle to _____ on SV/LVEDV graph.
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left, increase contractility
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What effect does a catecholamine have on heart and give examples of some catecholamines.
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positive ionotropic effect, increases heart contractility. Examples are Norepinephrine and epinephrine, and isoproterenal(best for Beta-1)
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what is aferload
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aortic blood pressure
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What are units of blood FLOW?
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(vol/time) L/min
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Velocity=_____/______
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distance(cm)/Unit time(min)
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Force exerted by blood on the walls of the vessel is
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Pressure
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What are units of pressure?
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(force/area) dynes/cm^2
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slows blood flow, blood tends to flow in layers and can impediment each other as they slide over blood vessels, this is known as...
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Resistance (frictional resistance)
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What part of the heart would you find a systolic/diastolic of 130/80mmHG?
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there
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Diastolic BP + 1/3pulse pressure is....
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Mean Blood pressure
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what is pulse pressure
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difference between highest BP and lowest BP(120-80)
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HARD:
1. What is the equation for FLOW? 2. What is equation for change in pressure? 3.what is equation for R or ΔP/Q? 4. The pressure gradient (dynes/cm^2) is...? |
Determinants of vascular resistance Poiseuille’s law
1. Q= ΔP / R 2. ΔP = P1 ‑ P2 3. ΔP/Q=(8×L×η) / (π×r4) 4. ΔP = Pressure gradient(dynes/cm^2) -xtra: Q = flow (ml/sec; cm3/sec) |
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_____ is gradient of Pressure from one end of vessel to the other(difference)
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Flow
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In the equation for Resistance (ΔP/Q=(8×L×η) / (π×r4)) doubling the _(1) and _(2) doubles the Resistance.
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(1) length
(2) viscosity (η) |
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An (increase/decrease) in RBCs would make the blood more viscous.
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Increase
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Lowered resistance and hematocrit is charecteristics of what blood disorder?
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anemia
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Increasing the radius (increases/decreases) resistance
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decreases
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What affect would vasodilation have on Radius, resistance, change in pressure, and flow(vol/time)
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-increase radius
-decrease Resistance -Change in pressure remains the same -Flow increases |
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What affect would vasoconstriction have on Radius, resistance, change in pressure, and flow(vol/time)
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-decrease radius
-increase resistance - decrease flow -change in pressure remains the same |
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is velocity of a vessel greater at sides or middle?
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middle
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doubling change in pressure would ___ flow
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double flow
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What is poiseiulle's law?
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Flow(Q with dot above)=Change in pressure/Resistance
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HARD:
What is reynolds number? |
(density x velocity x vessel diameter)/viscosity
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______ is the total flow of systemic circulation
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Cardiac output
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Hard:
CO= (_____-_____)/_____ |
CO=Mean arterial BP(MABP)-Rt atrial pressure/Total peripheral resistance(TPR)
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This area has a pressure of 1-2mmHg.
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rt atria or venous pressure
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