(FIT)-Module 4 Workshop 6: Electrocardiographic and Electrophysiological Correlations-Gerstenfeld Case 5 Question

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Okay, this is a biophysics question, RF energy is applied in the same location with perpendicular catheter orientation to the tissue, same blood flow under several scenarios. Which of the following settings would be expected to result in the deepest lesion? This comes into play understanding ablation and understanding the biophysics of RF ablation. So A, an eight millimeter tip, non-irrigated catheter, 40 watts for 20 seconds. B, a four millimeter tip, irrigated with normal saline, 40 watts for 20 seconds. C is a four millimeter irrigated with half normal saline for 20 seconds. And D is four millimeter tip irrigated with normal saline, high power short duration, five watts for five seconds. So go ahead and pick which of these combinations give you the largest lesion.

Keywords

RF ablation

lesion depth

catheter tip size

irrigation saline concentration

power and duration settings