Movement of blood into and out of the arteries during the cardiac cycle The blood moved in a Entry from Arteries Exit via single heart contraction heart arterioles stretches out the arteries so that their recoil continues to push on the blood keeping it Systole moving during diastole Progressive and diffuse fibrosis of vessel walls with age reduces the elastic properties and the Diastole compliance of arteries Arteriosclerotic change gives rise to larger pulse pressure Aortic or pulmonary valve
The blood moved in a single heart contraction stretches out the arteries, so that their recoil continues to push on the blood, keeping it moving during diastole. Movement of blood into and out of the arteries during the cardiac cycle Progressive and diffuse fibrosis of vessel walls with age reduces the elastic properties and the compliance of arteries. Arteriosclerotic change gives rise to larger pulse pressure. 11
Artery blood pressure Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display Systolic 120 E90 5 80 Diastolic 目500 Systolic Diastolic 0三
Artery blood pressure 12
Copyright o The MoGraw-Hill Companies, Ine, Permission required lor reproduction or display. (a) Systolic pressure Systolic pressure(SP,收缩压:the12 Aortic valve closure maximum arterial pressure reached during peak ventricular EEg Mean pressure ejection Diastolic pressure(DP,舒张压):the Diastolic minimum arterial pressure just pressure before ventricular ejection begins Pulse pressure(P,脉压):the difference between sp and dp 200 Mean arterial pressure(MAP,平均动 脉压): the average pressure in the10 cardiac cycle(=DP+1/ 3PP)or Systolic pressure Mean pressure (=2/3DP+1/3sP) Diastolic pressure ear 13
Systolic pressure (SP，收缩压): the maximum arterial pressure reached during peak ventricular ejection Diastolic pressure (DP，舒张压): the minimum arterial pressure just before ventricular ejection begins Pulse pressure (PP，脉压): the difference between SP and DP Mean arterial pressure (MAP，平均动 脉压): the average pressure in the cardiac cycle (=DP+1/3PP) or (=2/3DP+1/3SP) 13
Physiological indications of MAP and Pp MAP: Is more consistent in large arteries than Sp or dp Does not reflect the compliance of arteries PP: Reflect the compliance of arteries e. g. in arteriosclerosis pp increases
Physiological indications of MAP and PP MAP: Is more consistent in large arteries than SP or DP. Does not reflect the compliance of arteries. PP: Reflect the compliance of arteries. e.g., in arteriosclerosis, PP increases. 14
Systole i Diastole Incisura Proximal aorta Arterial pulse Femoral artery recorded in different vesse s Radial artery Arteriole Capillary 2 Time(seconds)
Arterial pulse recorded in different vessels 15