Ablations

Question 1

At what temperature does cell death occur for RF ablations?

Answer 1

50 C

Question 2

Wha mode of heating is closest to the tissue and electrode?

Answer 2

Resistive Heating

Question 3

What mode of heating is furthest from the tissue and electrode?

Answer 3

Conductive Heating

Question 4

What type of fluid is used in irrigated ablation catheters?

Answer 4

Room temp heparinized saline

Question 5

What is the most common used energy source for cardiac ablations?

Answer 5

RF energy

Question 6

Irreversible tissue damage occurs. as what temperature in RF ablations?

Answer 6

greater than 50 C

Question 7

The larger the catheter the lager or smaller the surface lesion will be?

Answer 7

Larger

Question 8

Will irrigation tips produce a deeper burn or shallower?

Answer 8

Deeper

Question 9

True or false; Atrial tissue can be successfully ablated with lower temps and smaller ablation stir compared to ventricular tissue?

Answer 9

True the atria is thinner than the ventricles

Question 10

What is the power used in RF ablations?

Answer 10

40-60 watts

Question 11

Temps above 100 C can cause what?

Answer 11

Steam pops

Question 12

How do you know if an effective lesion is formed from an RF ablation?

Answer 12

there will be a 5-15 ohms drop

Question 13

During a cryo ablation what temp is mapping mode done in?

Answer 13

-30 C

Question 14

When does irreversible damage start for cry ablation?

Answer 14

• 70 C

Question 15

What forms in cryo ablation?

Answer 15

Intracellular ice

Question 16

How do you convert Fahrenheit to Celsius?

Answer 16

C = 5/9(F-32)

Question 17

How do you convert Celsius to Fahrenheit?

Answer 17

F = C x 9/5 + 32

Question 18

During RF ablation the most destruction of the myocardial tissue is due to what?

Answer 18

the conduction of heat into the tissue

Question 19

During an RF ablation when the impedance rises suddenly what should you do?

Answer 19

Stop ablation and inform the physician as there could be char forming

Question 20

An increase in tissue temperature during an RF ablation is a result of what?

Answer 20

Resistive heating

Question 21

What is used in Cryo ablation as the refrigerant?

Answer 21

Nitrous oxide gas

Question 22

Cryoablation is described as what?

Answer 22

Removal of heat

Question 23

What is the standard temp for RF ablation?

Answer 23

50-70