Blood Pressure Blood Pressure To reach your hands
Blood Pressure
Blood Pressure To reach your hands and feet, blood has to leave your heart (Left Ventricle) under very high pressure.
Blood Pressure 1. The aorta has the highest pressure. (100 mm Hg) 2. As the blood gets farther away and the blood vessels get smaller, the pressure decreases. 3. The capillaries have a much lower blood pressure. (35 mm Hg) 4. The lowest pressure is in the Vena Cava. (2 mm Hg)
Blood Pressure
Blood Pressure is a ratio Highest = when the ventricles = SYSTOLIC contract Pressure Lowest = when the ventricles = DIASTOLIC relax Pressure
Blood Pressure
Blood Pressure ▪Measured with a sphygmomanometer
How does the sphygmomanometer work? ▪ It’s an inflatable cuff that cuts off the circulation in your arm ▪ When the pressure drops, you can HEAR blood forcing through the artery with a stethoscope (Systolic) ▪ When you HEAR NOTHING, it means blood is flowing easily with no resistance in the arteries. (Diastolic)
Blood Pressure
Normal blood pressure of teenager Ranges between 120/70 and 115/75
What can affect your blood pressure? ▪ Volume of blood ▪ Heart Rate ▪ Diameter of arteries ▪ Loss of elasticity of arteries ▪ Viscosity of blood
Hypertension High Blood Pressure = Hypertension Increases risk of heart failure and cerebral hemorrhage or stroke
Smoking & Hypertension Smoking causes high blood pressure ØThickens blood ØSpeeds up the heart ØConstricts the blood vessels ØOver time, causes loss of elasticity of arteries
Stress & Hypertension Stress causes high blood pressure ØStimulates adrenal gland which speed up the heart rate ØConstricts blood vessels
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