CV | Note

Hemodynamic

BP= flow * resistance

Blood pressure

Necessary to overcome friction and elastic forces and sustain blood flow

The heart is responsible for blood pressure

Blood pressure

140/90 is high blood pressure

High blood pressure- the silent killer; people can't feel that they have it

1/4 people have mild high blood pressure

Systole pressure- result of systole (believe pressure in the ventricles)

Diastole- lowest pressure in your arteries

Mean Arterial Pressure (MAP)

Average arterial pressure during a single cardiac cycle

Take blood pressure and break it down to a single number

Factors That Influence Arterial Blood Pressure

Blood volume shouldn't really change day to day or minute to minute unless something else is happening

Why is blood pressure dropping? Losing blood and decreasing stroke volume (the stroke volume is what you feel when you take a pulse)

If stroke volume is going down, the heart rate is increasing by maintaining cardiac output

Blood viscosity- thickness of blood

When blood is very viscous, the heart has to pump harder because it takes more force

As long as you are drinking water, it will keep your viscosity in homeostatic

Volume and viscosity don't really change but heart rate does

Peripheral resistance increases (cardiac output)

This changes all the time

Resistance to blood vessels

When you decrease this, invite blood to come into this direction

Cardiovascular Regulation

The purpose is to make sure tissue per-fusion is appropriate

Three different ways the system is regulated:

Local: Right here in the capillary beds (capillary site of exchange)

Occur at rest

Neural Regulation

CV