HTHSCI 1H06 Lecture Notes - Lecture 7: Blood Pressures, Aortic Body, Hyponatremia

• School: McMaster University
• Department: Health Sciences
• Course: HTHSCI 1H06
• Professor: Peter Helli

Document Summary

Define blood flows and blood pressures (including mean arterial bp, systolic bp, diastolic. Explain short term and long term mechanisms for maintaining bp. Volume of blood that flows through any tissue in a given period of time (in ml/min) Determined by heart rate and stroke volume. Blood flow (cid:3203) co = hr * sv. Stroke volume (cid:3202) preload (cid:3202) afterload (cid:3202) contractility. Pressure difference (cid:3202) blood moves from high to low pressure (cid:3202) increased pressure difference = increased flow (cid:3202) increased resistance to blood flow will reduce cardiac output. Pressure (force) exerted by the blood on the walls of a vessel. If decrease in blood volume is over 10%, bp drops. Increase in vessels further away greater increase in cross-sectional area. Highest blood pressure is the systolic pressure. The lowest pressure is the diastolic pressure. Difference between systolic and diastolic is the.