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Hystolic Blood Pressure

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It is hypothesized that the systolic blood pressure measured by the cardiac microphone, and by the finger pulse transducer will be significantly lower when the arm is raised above the head, compared to when the arm is at heart level and below the heart level, and the mean arterial pressure (MAP) determined from the calf will be significantly lower when the subjects are laying down compared to when they are standing up.

Rationale:
Gravity plays a large role in blood flow. This gravitational pull that directly affects blood is referred to as “hydrostatic pressure.” Gravity has a greater impact on blood flow in specific parts of the body, dependent upon location. The hydrostatic pressure is higher in lower limbs (or limbs located below the …show more content…
Discussion:
In each experiment the p-value was less than 0.001 in each of the three statistical tests. Therefore, the alternate hypothesis was accepted. As stated in the rationale, hydrostatic pressure due to gravity is a factor in blood pressure and mean arterial pressure.
The hydrostatic pressure is higher in lower limbs compared to hydrostatic pressure in upper limbs (Citation). When the arm is raised above the head, it is higher than the heart. As a result, there will be little to no build up of pressure above it because there is no blood pressing down on the tip of the fingers (upon which the finger pulse transducer is placed). There is more buildup of pressure from the weight of the fluid accumulated above the leg, as the legs are a part of the lower half of the body. When the subjects are laying down, the leg is parallel to the heart, and thus at “heart level.” The gravitational weight is lessened dramatically, which, in turn, will reduce blood pressure. The mean arterial pressure, which measures the cardiac cycle’s average pressure is expected to have similar results (MAP

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