Effects Of Posture On Blood Pressure

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The purpose of this study was to further understand the cardiovascular system under normal conditions, stress and postural changes. To help illustrate the effects of the cardiovascular systems components the dive reflex and venous system were also tested. In the tilt table test, the response of effect of gravity and sympathetic activation of the heart were being examined to determine the response of BP, MAP, PP, HR, SV, CO and TPR during Effects of Posture on Blood Pressure (BP). It was hypothesized that MAP, PP, HR, SV, CO and TPR would decrease upon tilt and MAP, PP, HR, SV and CO would increase back near baseline. The expected BP decrease is due the pooling of blood in the legs and lower organs of the body. Since, the subject was in supine …show more content…
TPR was hypothesized to decrease as having blood pool and needing to be returned, the body would want less resistance to make this less strenuous on the body. TPR is the resistance the vessels push back on the blood trying to flow through (Sherwood, 2010, p.358). A study by Goodman and LeSage (2002) illustrated exactly that, TPR decreasing upon being tilt. However, the results indicate that TPR increased during tilt (Figure 6). Since TPR is calculated by MAP/CO, and there being issues with CO, it is suspected a compounding issue when dealing with an indirect measurement is occurring. If, there were not the issues with CO, SV and HR and a similar result was seen, then alternatives could be possible …show more content…
Vasodilation in Response to Metabolites was a single observation that results showed that when metabolites are in the system by inflating a cuff and repeating clenching, the color and temperature of the arm decreased and returned relativity quickly once the cuff was removed. The blood flow rushing back from a temporary blockage is reactive hyperemia. The rate that reactive hyperemia is overcome could possibly have implications to show how healthy the veins of the forearm

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