What are we looking at? During catheter placement and throughout the procedure, the electrophysiologist will rotate between two main x-ray angulations. The following image are examples from my case files and are only meant for an introduction to x-ray views....
We have tachycardia… The patient has been determined to have AVNRT and a slow pathway ablation is being performed. This 3D image is in an RAO projection with a cutaway to see the internal aspect of the right atrium. Which of the following would you...
A 45-year-old female presents to the EP lab with complaints of palpitations and the following 12 lead ECG that was recorded in the emergency room 2 weeks prior. 12 Lead ECG: What do you observe? Answer: Retrograde P Waves Notice the retrograde P waves,...
What are double potentials? Answer: The term double potential literally means two potentials or signals. Most referred to in the atrium, double potentials are atrial electrograms with two discrete deflections per beat separated by an isoelectric or low...
Question: Today, let’s go back to the basics and discuss catheter placement and waveforms. In the following electrogram, none of the intracardiac channels are labeled. Identify each catheter location, the associated waveforms, and the rhythm. Answer: This is an...
This week’s electrogram: This patient was brought into the EP lab for ablation of typical atrial flutter. She has had no previous ablations and was in normal sinus rhythm when placed on the monitor. The following electrogram was recorded at soon as the...