1. Auscultation method is more accurate by using the stethoscope to listen for systolic blood pressure compared to palpation of systolic blood pressure at wrist. It is easier to listen for the ‘tap’ during the systolic pressure rather than palpating for it, as the systolic pressure may not be palpated if it is a weak pulse.
2. Systolic pressure:
• Pressure in the arteries when the blood is being pumped out of the heart into the arteries
• The maximum blood pressure, when the ventricles are in contracting phase
Diastolic pressure:
• Pressure in the arteries when the blood is flowing away from the arteries into the other blood vessels
• The minimum blood pressure, when the heart is relaxed
Pulse pressure:
• Difference between the systolic pressure and diastolic pressure
• The amount of force produced for a contraction of the heart to occur
3.
Arm is raised:
• More …show more content…
There would be pooling of blood in the legs and decrease of blood volume going to the head. Pooling of venous blood in the legs decrease venous return, hence decreasing the stroke volume according to the Frank-starling relationship, leading to cardiac output decreasing. Overall, the mean arterial pressure decreases, as shown in the results (decreasing from 67mmHg to 33mmHg).
The carotid and aortic baroreceptors sensed the fall in pressure in the reduced stretch in the aortic arch and carotid sinus. This immediately increased sympathetic nervous system innervation to SA node (increases heart rate), force of contraction of the ventricles and vasoconstriction, in order to restore the fall in blood pressure to the brain. Decrease in parasympathetic nervous system innervation, further reinforces the increase in heart rate. Sympathetic and parasympathetic nervous system coordination led to immediate increase in heart rate, as shown in the immediate increase to 106bpm in the
2. Systolic pressure:
• Pressure in the arteries when the blood is being pumped out of the heart into the arteries
• The maximum blood pressure, when the ventricles are in contracting phase
Diastolic pressure:
• Pressure in the arteries when the blood is flowing away from the arteries into the other blood vessels
• The minimum blood pressure, when the heart is relaxed
Pulse pressure:
• Difference between the systolic pressure and diastolic pressure
• The amount of force produced for a contraction of the heart to occur
3.
Arm is raised:
• More …show more content…
There would be pooling of blood in the legs and decrease of blood volume going to the head. Pooling of venous blood in the legs decrease venous return, hence decreasing the stroke volume according to the Frank-starling relationship, leading to cardiac output decreasing. Overall, the mean arterial pressure decreases, as shown in the results (decreasing from 67mmHg to 33mmHg).
The carotid and aortic baroreceptors sensed the fall in pressure in the reduced stretch in the aortic arch and carotid sinus. This immediately increased sympathetic nervous system innervation to SA node (increases heart rate), force of contraction of the ventricles and vasoconstriction, in order to restore the fall in blood pressure to the brain. Decrease in parasympathetic nervous system innervation, further reinforces the increase in heart rate. Sympathetic and parasympathetic nervous system coordination led to immediate increase in heart rate, as shown in the immediate increase to 106bpm in the