Ablations Flashcards
At what temperature does cell death occur for RF ablations?
50 C
Wha mode of heating is closest to the tissue and electrode?
Resistive Heating
What mode of heating is furthest from the tissue and electrode?
Conductive Heating
What type of fluid is used in irrigated ablation catheters?
Room temp heparinized saline
What is the most common used energy source for cardiac ablations?
RF energy
Irreversible tissue damage occurs. as what temperature in RF ablations?
greater than 50 C
The larger the catheter the lager or smaller the surface lesion will be?
Larger
Will irrigation tips produce a deeper burn or shallower?
Deeper
True or false; Atrial tissue can be successfully ablated with lower temps and smaller ablation stir compared to ventricular tissue?
True the atria is thinner than the ventricles
What is the power used in RF ablations?
40-60 watts
Temps above 100 C can cause what?
Steam pops
How do you know if an effective lesion is formed from an RF ablation?
there will be a 5-15 ohms drop
During a cryo ablation what temp is mapping mode done in?
-30 C
When does irreversible damage start for cry ablation?
- 70 C
What forms in cryo ablation?
Intracellular ice
How do you convert Fahrenheit to Celsius?
C = 5/9(F-32)
How do you convert Celsius to Fahrenheit?
F = C x 9/5 + 32
During RF ablation the most destruction of the myocardial tissue is due to what?
the conduction of heat into the tissue
During an RF ablation when the impedance rises suddenly what should you do?
Stop ablation and inform the physician as there could be char forming
An increase in tissue temperature during an RF ablation is a result of what?
Resistive heating
What is used in Cryo ablation as the refrigerant?
Nitrous oxide gas
Cryoablation is described as what?
Removal of heat
What is the standard temp for RF ablation?
50-70
