QUESTIONS 11-16: The following graph demonstrates the blood pressure changes in
ID: 3505166 • Letter: Q
Question
QUESTIONS 11-16: The following graph demonstrates the blood pressure changes in the left vent (black) during the cardiac cycle. Match each event in column A with the correct arrone in column B. Answers may be used more tin ricle (red), left atrium (blue), and aorta SYSTOLE VENTRIOULAR VENTRICULAR DIASTOLE 120 Aorta 90 60 Left 30 L eft atrium 0 100 200 30 400 500 600 700 800 Time (msec) 11. Aortic valve closes 12. First heart sound occurs 13. Left AV valve opens 14. Left AV valve closes 15. Aortic valve opens 16. Second heart sound occurs a. Arrow A b. Arrow B c. Arrow C d. Arrow D Arteriosclerosis decreases the elasticity of arterial walls and increases arterial resistance to blood flow. Suppose there are two patients One has a resting blood pressure of 115/70. The other has a resting blood pressure of 140/1 a. Calculate the pulse pressure and MAP of each individual. 17. b. Which patient do you think has arteriosclerosis? Explain c. For the person with arteriosclerosis, how must the pulse pressure change to maintain normal blood fow 432 EXERCISE 23 Cardiovascular PrhysiologyExplanation / Answer
11. Aortic valve closes-------------------Arrow C
12.First heart sound occurs-------------Arrow B
13.Left AV valve open--------------------Arrow D
14.Left AV valve closes------------------Arrow A
15.Aortic Valve open------------ Arrow B
16. Second heart sound occurs-------Arrow C
17. Calculate the pulse pressure and MAP of each individual
Pulse pressue= psystolic-P(diastolic)
PP=115-70=45mm
PP=140-100=40mm
Formula for calculating
DP+1/3(SP-DP)
So 2/3(DP)+1/3(SP)
For 115/70
Answer---MAP=84.99
For 140/100
Answer---MAP=113
B- patient with high pulse pressure will develop 115/70mm Hg. Higher systolic and diastolic pairs imply higher risk than lower pairs with the same pulse pressure: 140/100 millimeters of mercury (mm Hg) indicates a higher risk than 110/70 mm Hg even though the pulse pressure in each pair is 40. he most important cause of elevated pulse pressure is stiffness of the aorta, the largest artery in the body. The stiffness may be due to high blood pressure or fatty deposits damaging the walls of the arteries, leaving them less elastic (atherosclerosis). The greater your pulse pressure, the stiffer and more damaged the vessels are thought to be.