生理学的概念及生命活动的特征 (17).ppt

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1、3Formation of Arterial Blood Pressure ABCDEFGABCDEFGABCDEFGABCDEFGABCDEFGABCDEFGABCDEFGABCDEFGABCDEFGABCDEFGABCDEFGABCDEFG3.Arterial Blood Pressure and Arterial Pulse3.1.Arterial Blood Pressure Arterial Blood Pressure:the intensity of pressure of the blood flowing in the blood vessel against the sid

2、e walls is called blood pressure,i.e.the pressure per unit area.Blood Pressure in different vessels in a normal person in the horizontal position3.Arterial Blood Pressure and Arterial Pulse3.1.Arterial Blood Pressure Compliance:how easily a structure stretchesThe greater the compliance of a structur

3、e,the more easily it can be stretched.3.Arterial Blood Pressure and Arterial Pulse3.1.Arterial Blood PressureCompliance:it is how easily a structure stretches3.Arterial Blood Pressure and Arterial Pulse3.1.Arterial Blood Pressure Arterial Blood Pressure usually refers to aortic blood pressure.How to

4、 measure the arterial blood pressure Indirect measurement of vertiginous arterial blood pressure by the Korotkoff method3.Arterial Blood Pressure and Arterial Pulse3.1.Arterial Blood Pressure The arterial blood pressure formation include the following four main aspects.uAdequate blood filling in the

5、 cardiovascular system:It is a prerequisite for the formation of arterial blood pressure uElastic reservoir action of the aorta and great arteries:This is important to reduce the fluctuation of arterial blood pressure during the cardiac cycle uPeripheral resistance:Peripheral resistance is mainly th

6、e resistance to blood flow by small arteries and arteriolesuCardiac ejection:It is a necessary condition for the development of arterial blood pressure 3.Arterial Blood Pressure and Arterial PulseNormal values of arterial blood pressure3.1.Arterial Blood Pressure Arterial blood pressure can be expre

7、ssed in terms of systolic pressure(SP),diastolic pressure(DP),pulse pressure and mean arterial pressure(MAP)Typical arterial pressure fluctuations during the cardiac cycle3.Arterial Blood Pressure and Arterial PulseMean arterial pressure3.1.Arterial Blood Pressure=+()Typical arterial pressure fluctu

8、ations during the cardiac cycle3.Arterial Blood Pressure and Arterial PulseThe factors affecting arterial blood pressure3.1.Arterial Blood Pressure Pulse pressureMAPStoke volumeArterialcomplianceHeartratePeripheralresistanceuStoke volumeuArterial complianceuHeart rateuPeripheral resistanceuMatching

9、of circulating blood volume to the capacity of the vascular system3.Arterial Blood Pressure and Arterial Pulse3.2.Arterial PulseThe Arterial Pulse is the cyclic fluctuation in the arterial wall caused by cyclic changes in intra-arterial pressure and volume during each cardiac cycle.The Arterial Puls

10、e Descending brancheAscending brancheSummaryThe arterial blood pressure formation depends on uAdequate blood filling in the cardiovascular systemuCardiac ejectionu Peripheral resistance uElastic reservoir action of the aorta and great arteries Arterial blood pressure includes systolic pressure(SP),diastolic pressure(DP),pulse pressure and mean arterial pressure(MAP)The factors affecting arterial blood pressureuStoke volumeuArterial complianceuHeart rateuPeripheral resistanceuMatching of circulating blood volume to the capacity of the vascular systemThank youABCDABCD