Tools of the Trade

Question 1

What does reversible perfusion imply?

Answer 1

ischemia due to increased demand (work ischemia)

Question 2

What does fixed perfusion imply?

Answer 2

ischemia due to infarctions, scars

Question 3

What are micro-bubbles used for?

Answer 3

they’re agitated saline that can show intra-septal defects or shunts- allow visualization of blood flow w/I the heart chambers

Question 4

What do radionucleotide perfusion studies look for?

Answer 4

imbalances btw supply and demand via decreased perfusion; compare at rest to exercise

Question 5

What are the radionucleotide perfusion imaging agents?

Answer 5

1. Thallium 204

2. Technetium-99m-Sestamibi (Cardiolite)

Question 6

What does stress echo look for?

Answer 6

imbalance btw supply and demand bc of a wall motion abnormality; compare rest to exercise

Question 7

Normally the left ventricle should _____ and ____ with exercise or dobutamine

Answer 7

beat faster; thicken more

Question 8

Normally the left ventricle should beat faster and thicken more with exercise or _______.

Answer 8

dobutamine

Question 9

What does a cardiac cath/coronary angiography measure?

Answer 9

1. pressure
2. gradients
3. saturation
4. intracardiac shunt