L5 Cardiac Output & BP

Question 1

Define diastole, its typical value, and relation to ArtPres

Answer 1

= relaxation of heart
= 80mmHg
= lowest Syst arterial press

Question 2

Define systole, its typical value, and relation to ArtPres

Answer 2

= contraction of heart
= 120 mmhg
= highest syst art press

Question 3

what are pulse pressure and MAP measured by

Answer 3

endogenous baroreceptors

Question 4

what is pulse pressure and typical value

Answer 4

40mmHg

• the difference between systolic and diastolic pressure.

Question 5

what is MAP and types value

Answer 5

90-95 mmHg
• the arterial pressure averaged over the cardiac cycle.
• Driving pressure= allows blood flow
• Mean venous usually 0

Question 6

HR + typ value

Answer 6

# contractions/min 
= 70

Question 7

SV + typ value

Answer 7

volume pumped by ventricle in one contraction

70ml

Question 8

CO + typ value

Answer 8

flow rate = HR x SV

5l/min

Question 9

Conversions involved in CO

Answer 9

CO (L/min)= HR x SV
Stroke volume usually in ml, HR in min= ml/min
- // need to convert to L

Question 10

venous return and typic value

Answer 10

flow rate into heart

5l/min

Question 11

interaction b/w venous return + CO

Answer 11

Ven return controls SV
Frank Starling
(inc VR > inc EDV >stretch ventricles > inc pressure they gen > inc SV

Question 12

Work out ejection fraction

Answer 12

SV= EDV - ESV