Heart Performance

Question 1

Spectral doppler ultrasonography

Answer 1

Velocity of blood as it goes through or across valves

Question 2

What does “m mode” of conventional echocardiography measure

Answer 2

Wall thickness and chamber size

Question 3

What does 2-D of conventional echocardiography show

Answer 3

Sectional images in real time

Question 4

Echocardiography can be used with doppler color flow. What are the colors and what do they represent?

Answer 4

Blue- blood flow away from doppler crystal
Red- blood flow toward doppler crystal

Question 5

What does pulse oximetry measure

Answer 5

hemoglobin saturation percentage

Question 6

Two light emissions from a pulse oximeter

Answer 6

Infrared and red

Question 7

What oxygen does infrared light read

Answer 7

Saturated

Question 8

What oxygen does red light read

Answer 8

Unsaturated

Question 9

What are some non invasive methods of monitoring heart performance (7)

Answer 9

1. Echocardiography
2. MM (color CRT)
3. Pulse oximetry
4. Palpation
5. Auscultation
6. Indirect BP
7. ECG

Question 10

What do pale MM indicate

Answer 10

Cold due to vasoconstriction