ANPS 020 Lecture Notes - Lecture 16: Pulse Pressure, Diastole, Hypotension
27 Feb 2019
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Document Summary
Organs must receive a steady flow of oxygen and nutrients in order to survive. Maintaining a steady flow of blood to the organs is the job of the cardiovascular system. Both the heart ad the blood vessels are capable of change in order to adjust the blood flow. There are only 5 liters of blood in the body, and it is constantly being redistributed between different organ systems. Flow is a function of pressure and resistance. Blood flow to tissues = difference in blood pressure between heart and capillaries. Arterial blood pressure (bp) : usually refers specifically to arterial pressure. Capillary hydrostatic pressure : pressure within the capillary beds. Systolic pressure the peak arterial pressure during ventricular systole. Diastolic pressure the minimum arterial pressure during diastole. Pulse pressure the difference between systolic and diastolic pressure. Throbbing feeling in an artery, not present in capillaries or veins. Hypertension abnormally high blood pressure (greater than 140/90)
