Blood_Pressure_10 - Cardiovascular System Regulates...

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Cardiovascular System Regulates appropriate blood flow to tissues and organs under varying conditions Q = ∆P/R Maintains normal mean arterial pressure Adjusts cardiac output Adjusts resistance to blood flow Regulation Via neural, hormonal, local mechanisms
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Pressure gradient Pressure gradient causes blood flow MAP of 100 mm Hg in the Thoracic aorta Central venous pressure of 0-2 mm Hg in R atrium Cardiac pump, differences in compliance between arteries and veins, and high resistance in arterioles create the pressure gradient Cardiac pump transfers volume from venous to arterial circulation Arterial circulation has a lower compliance so the same volume of blood creates a higher pressure
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Mean systemic pressure:
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Hemodynamics Physical factors that govern blood flow Arterial blood pressure Total peripheral resistance aka: systemic vascular resistance Blood volume Compliance Q = P / TPR P = CO x TPR MAP – CVP = CO x SVR
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Mean Arterial Pressure(MAP) Pa = Diastolic pressure + 1/3 (Pulse pressure) Pulse pressure = Systolic – Diastolic Changes in response to CO & TPR
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This note was uploaded on 02/18/2012 for the course MPAS PA 602 taught by Professor Dr.laird during the Fall '10 term at Chatham University.

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Blood_Pressure_10 - Cardiovascular System Regulates...

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