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Blood Pressure
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What is the lub dub sound your heart makes?
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Lub
• Lub = tricuspid and bicuspid valves closing at the same time after the blood has been squeezed into the ventricles from the atria
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Dub
• Aortic and pulmonary valves closing at the same time when the blood is being squeezed from the ventricles to either the aorta or pulmonary artery
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Blood pressure is the force that your blood puts on your blood vessels as it is pumped out of your heart
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Blood pressure is measured in the arteries
• Systolic pressure = when the heart contracts (both the lub and the dub)
• Diastolic = when heart relaxes
• Why do you think we measure blood pressure in the arteries and not the veins?
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Questions?
• Do you think your blood pressure is constant?• What do you think causes it to change?
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Measuring general blood pressure
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Measured by an electrocardiogram
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Pulse
• Vibration or waves made by pressure exerted by blood on blood vessels
• Throbbing of our arteries as a result of our heart beat – in most people the pulse is an accurate measure of heart rate
• Normal pulse rate for a healthy adult, while resting, can range from 60 – 100 beats per minute. During sleep this can drop to as low as 40 beats per minute
• Active heart rate can be as high as 200 – 220 beats per minute
• Pulse rates are generally hgher in younger people
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Common Pulse Points
• Radial Pulse• Ulnar Pulse• Carotid pulse• Brachial pulse• Femoral Pulse• Temporal Pulse
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