EXPERIMENT NO. 02
“TO OBSERVE THE EFFECT OF THE POSITION AND EXERCISE ON CARDIAC ACTIVITY
(I.E. BLOOD PRESSURE AND PULSE RATE)”
Requirements:
Sphygmomanometer, Stethoscope
Theory:
The blood pressure in the brachial artery in young adults in the sitting or lying position at rest is
approximately 120/70mmHg. Since the activated pressure in the product of Cardiac output preload and
peripheral resistance, it is affected by condition that affect on both these factors. In general increase in
cardiac output preload increase in systolic blood pressure, whereas increase in peripheral resistance
increase in diastolic pressure. In standing position as a result of gravity on the bed, the mean arterial blood
pressure in any vessel below heart level is increased and that in any vessel about heart level is decreased
by the effect of gravity. Thus in an adult human in the upright position, when the mean arterial pressure at
the heart level in 100mmHg, the mean pressure in the larger artery in the head (50cm above the head) is
62mmHg and pressure in the large artery in the point is 180mmHg. If there were no compensatory
cardiovascular changes, the reduction in cardiac output preload due to pooling on standby would lead to
reduction of cerebral flow (of this magnitude) and conscious men would be last. The response to exercise
involving isotonic muscle contraction is that there is a prompt increase in heart rate and a marked increase
in shorter volume as a result Cardiac output preload is increased to the halves that may exceed 35L/min.
the amount being proportionate to increase in oxygen consumption. The heart muscle contracting more
forcibly & discharge more if the end systolic volume of the blood in the ventricles. After exercise, the BP
may transiently drop to sub normal levels pressurably because accumulated metabolites keep the muscle
vessel dilated for a short period, however the blood pressure soon returns to the pre exercise level. The
heart rate returns to normal more slowly.
Procedure:
Ask the subject to lie quietly for 5 min, after which determine systolic
and diastolic blood pressure by auscultation. Record the pulse rate
immediately before and after the BP determination then ask the subject
to stand invert and after 2 min, determine BP and PR as before. Finally
ask the subject to exercise for 2 min then take the BP and PR, continue
the measurement once every 2 min until recovery has occurred
College of Applied Medical Sciences
Observation:
Blood Pressure
Before Exercise
Pulse Rate
After Exercise
Before Exercise
After Exercise
Result:
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Sources of Error:
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Discussion:
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