cardiovascular system cardiac output and blood pressure.txt

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mwinstom
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252570
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cardiovascular system cardiac output and blood pressure.txt
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2013-12-11 09:23:43
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  1. ´╗┐This is the term used when the heart is at rest
    diastole
  2. this is the term used when the heart is contracting
    systole
  3. this is the surge of blood felt in the arteries due to contraction of the ventricle
    pulse
  4. This is the amount of blood that leaves the left ventricle each beat
    stroke volume (SV)
  5. This is the amount of blood that leaves the heart every minute
    cardiac output
  6. This is the number of times the heart beats every minute
    heart rate (HR)
  7. This is the total volume of blood found in the cardiovascular system
    blood volume
  8. This refers to the strength of contraction of the heart
    contractility
  9. This is the term used to describe the amount of blood going into the heart
    venous return
  10. This is the amount of blood found in the ventricle at the end of the rest cycle, immedietly prior to the ventricle contracting
    end diastolic volume (EDV)
  11. This is the amount of blood remaining in the ventricle after the end of contraction
    end systolic volume (ESV)
  12. What is the formula to determine stroke volume
    EDV-ESV
  13. What is "Frank Starling's Law of the Heart"
    The more the cardiac muscle is stretched, the stronger it will contract
  14. The stretching of the ventricle due to the amount of blood entering the ventricle is called
    preload
  15. The resistance the heart must overcome to pump blood out of the heart into the systemic circulation is
    afterload
  16. What are the three main determinants of stroke volume
    1. preload
  17. 2. afterload
  18. 3. contractility
  19. What is the MAIN determinant of PRELOAD
    venous return
  20. What is the MAIN determinant of AFTERLOAD
    total peripheral resistance (TPR)
  21. what is the intrinsic determinant of contractility
    CiCr-Calcium induced, Calcium release-excitation coupling
  22. What are the extrinsic determinants of contractility
    ANS and hormones (epi nephrine)
  23. What are the four determinants of venous return
    1. total blood volume
  24. 2. respiratory pump
  25. 3.skeletal muscle pump
  26. 4.visceral blood reservoir
  27. How much of the blood that is circulating in the body is found in the visera?
    70%
  28. What term is used to describe the blood which is "stored" in the viscera
    visceral blood reservoir
  29. what is the formula for cardiac ouput
    CO=SV * HR
  30. What is the formula for Blood Pressure
    BP=CO * TPR
  31. what is the formula to determine total peripheral resistance
    R=8nl/pr4
  32. n=viscosity
  33. l=length of vessels
  34. p= constant (3.14...)
  35. r4=radius to the 4th power
  36. What is the MAJOR determinant of Resistance in a vessel
    radius
  37. what isthe formula for mean arterial pressure
    MAP = DP + 1/3 PP
  38. The measured blood pressure at the end of diastole is called
    diastolic pressure (DP)
  39. The measured blood pressure at the end of systolic is called
    Systolic pressure (SP)
  40. The difference between the DP and SP is the
    Pulse Pressure (PP)
  41. What are the values for normal blood pressure
    120/80 mm Hg
  42. If one's blood pressure is to high, what can be done to the diameter of the blood vessels to reduce the pressure
    Increase their inner diameter. Since Resistance is directly due to the diameter, by increasing the diameter, you increase the radius, and the Resistance decreases. Since resistance decreases the blood pressure decreases
  43. In regards to the formula for resistance, to what does ~n (viscosity) refer
    the thickness of the blood. ex: honey is more viscous than water

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