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Blood pressure-Ricky Hellyar
Transcript of Blood pressure-Ricky Hellyar
R.Hellyar & A.Santos
What is blood pressure?
Let's think about us now!
Blood Pressure = Peripheral resistance x Cardiac Output
BP = PR X CO
Quick question for you, why 2 numbers?
Terms to familiarise yourself with:
HR x SV = CO
Pre-load, after-load and contractility
SVR=Systemic Vascular Resistance
Peripheral Resistance or SVR
Resistance offered by the arterial system (not pulmonary)
There are multiple feedback mechanisms-
Anti-Diuretic Hormone- BP low, stimulates kidneys to conserve water. (Osmoreceptors)
Atrial Peptide-Atria overstretched, stimulates kidneys to lose water. (Baroreceptors)
It's not easy, you have to read! You will get it!
We are constantly in a state of change
Gain an understanding of Blood Pressure
What it is, what alters it!
Please stand up!
Form a rugby tunnel.
Now for a little experiment!
Up a level
Consider Circulating Volume