CV physiology

Question 1

cardiac output

Answer 1

1) stroke volume x HR

2) rate of O2 consumption/ (arterial O2 content - venous)

Question 2

Mean arterial pressure

Answer 2

CO x total peripheral resistance

Question 3

MAP

Answer 3

2/3 diastolic pressure and 1/3 systolic pressure

Question 4

Pulse pressure

Answer 4

systolic pressure - diastolic pressure

Question 5

Pulse pressure proportional to

Answer 5

stroke volume

Question 6

Stroke volume

Answer 6

1) CO/HR

2) EDV - ESV

Question 7

During early stage of exercise,

CO is maintained by

Answer 7

High HR and high SV

Question 8

During late stage of exercise,

CO is maintained by

Answer 8

High HR only (SV plateus)

Question 9

If HR is too high,

Answer 9

(e.g. ventricular tachy)
diastolic filling is incomplete and
CO decreases