Let’s combine looking at 3D images along with the corresponding electrograms to determine entrance block. This 3D geometry was created for a pulmonary vein isolation procedure for atrial fibrillation. We are viewing the posterior wall of the left atrium. The...
This week’s electrogram interpretation: What is observed in the following electrogram? Answer Loss of Capture With a quick look, it may appear that you are looking at AV block or Wenckebach… this is not the case. Before...
This week’s electrogram interpretation: What is observed in the following electrogram? The channels labeled A – D (green, teal, red, yellow) are recording from the HD grid (high-density mapping catheter) in the LIPV. This was recorded while...
This week’s electrogram interpretation: What is observed in the following electrogram? Answer AV Wenckebach Atrial decremental pacing is occurring via CS 9,10. Notice the narrow QRS complex; therefore, we are not pacing/capturing the...
What type of pacing is being performed in the following electrogram? What is your interpretation? Answer AP ERP Each impulse in the drive train (S1) captured the atrium and conducted to the ventricle. However, notice the wide QRS complex due to the...
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