Stress Testing with Nuclear Imaging

Question 1

most widely used nuclear per fusion agents

Answer 1

Thallium 201

technestium 99m

Question 2

nuclear testing can be done on ____________ or _______________

Answer 2

a treadmill or pharmocologically

Question 3

myocardial perfusion imaging can be performed with these techniques

Answer 3

planar

tomographic

Question 4

planar myocardial imaging uses

Answer 4

gama scintillation camera

three standard views

Question 5

three standard views of nuclear testing

Answer 5

anterior
anterior oblique
left lateral

Question 6

tomography imaging (SPECT)

Answer 6

30-32 projections each for 40 secs

deliver image in slices

Question 7

thallium 201

Answer 7

is a metallic element with properties similar to potassium

Question 8

three projections of tomography

Answer 8

short axis
vertical long axis
horizontal long axis

Question 9

half life of thallium

Answer 9

73 hours

Question 10

myocardial thallium activity reaches 80% after how long

Answer 10

1 min

Question 11

peak myocardial activity is how long after thallium injection

Answer 11

24 mins

Question 12

peak myocardial blood flow during a thallium test is reached at

Answer 12

1 min

Question 13

regions that demonstrate increased activity at rest

Answer 13

significant or flow limiting stenosis

Question 14

patients should fast before tests to

Answer 14

minimize GI intake of agent

Question 15

perfusion agent is administered at this % of peak exercise

Answer 15

85%

Question 16

how long after do delayed images become obtained later using the same technique

Answer 16

3-4 hours

Question 17

patients are asked to eat fatty foods between delayed images because

Answer 17

it moves the liver out of the way

Question 18

myocardial segments

Answer 18

designed to correspond to the customary perfusion territory of a coronary artery

Question 19

anterior, anterolateral and septal areas correspond with which CA

Answer 19

Left anterior descending CA

Question 20

inferior segments correspond to which CA

Answer 20

right CA

Question 21

posterior, lateral segments correspond to which CA

Answer 21

left circumflex CA

Question 22

apical area receives it blood supply from which coronary artery

Answer 22

left anterior descending

Question 23

nuclear myocardial imaging are used on what kind of patients

Answer 23

with preexisting EKG abnormalities

Question 24

nuclear imaging is better because

Answer 24

• better localization of ischemia

- improve sensitivity of stress test

Question 25

patients with normal perfusion

Answer 25

very low risk of cardiac death or MI

Question 26

patients with reversible perfusion defects in multiple vascular regions

Answer 26

are at high risk for future cardiac events