Cardiac Lecture 1

Question 1

Normal MAP for this class

Answer 1

100mmHg (93 more accurate)

Question 2

Normal MAP calculation

Answer 2

MAP= Diastolic + 1/3 x (Sys - Dia)

Question 3

Normal RA pressure

Answer 3

0 mmHg

Question 4

Normal PA pressure (mPAP)

Answer 4

16 mmHg

Question 5

Normal PA systolic pressure

Answer 5

25mmHg

Question 6

Normal PA diastolic pressure

Answer 6

8mmHg

Question 7

Normal LA pressure

Answer 7

2 mmHg

Question 8

Compliance

Answer 8

ability to stretch

change in volume over change in pressure

Δ V / Δ P

Question 9

If a high pressure is needed to pump a volume into a space, the compliance of that space would be ______

Answer 9

low

Question 10

If a low pressure is needed to pump a volume into a space, the compliance of that space would be ______

Answer 10

high

Question 11

Normal CO for this class

Answer 11

5 L/min

Question 12

Normal HR for this class

Answer 12

72bpm

Question 13

Normal stroke volume for this class

Answer 13

70mL

Question 14

gravity’s effect on BP

Answer 14

13.6mm = +1 mmHg

Question 15

Reference point for BP with 0 effects of gravity

Answer 15

Isogravimetric point

Question 16

Where is the isogravimetric point located

Answer 16

In the tricuspid valve

Question 17

Venous system is a ______ compliance system

Answer 17

high

Question 18

Arterial system is a _______ compliance system

Answer 18

low

Question 19

Adding volume, but having little effect on pressure means the system is _____ compliance

Answer 19

high

Question 20

Adding volume and having large effect on pressure means the system is _____ compliance

Answer 20

low

Question 21

A ________ system readily accepts volume

Answer 21

high compliance

Question 22

Free water clearance (CH2O)

Answer 22

volume of water removed from body/time

Question 23

Relationship between free water clearance and ADH

Answer 23

Inverse
- More ADH → low free water clearance
- Low ADH → high free water clearance

Question 24

Pulmonary circuit ΔP

Answer 24

PAP - LAP → 14 mmHg

Question 25

Pulse pressure (ΔP) in the aorta

Answer 25

120 - 80 = 40 mmHg

Question 26

Pulse pressure calculation

Answer 26

Pulse pressure = systolic - diastolic

Question 27

Pulse pressure in arteries vs veins

Answer 27

High in arteries and low in veins due to compliance

Question 28

Why does the pulmonary circuit have low pulse pressure?

Answer 28

low vascular resistance

Question 29

Relationship between pulse pressure and stroke volume

Answer 29

Inverse - high SV increases pulse pressure and low SV decreases pulse pressure

Question 30

What are the venous vascular pressures at the umbilicus, knee, and base of foot?

Answer 30

20 mmHg @ umbilicus, 40 mmHg @ knee, 90 mmHg @ base of foot

Question 31

What are the venous vascular pressures in the cranial sinuses?

Answer 31

-10 mmHg

Question 32

Define distensibility

Answer 32

Aka expandability, similar to compliance but includes original volume of the container; determines how much volume the container can accept
- small original volume = higher distensibility

Question 33

normal SVR

Answer 33

800 - 1600

Question 34

How much blood is in the venous vs arterial circulation?

Answer 34

700 mL of blood in arterial circulation
2500 mL of blood in venous system

Question 35

On a pressure vs volume graph, the slope of the line is an estimate of ______

Answer 35

compliance