Parahisian Pacing – Quick Review As discussed in the previous post, parahisian pacing is performed by pacing the HIS catheter at high output. A narrower QRS complex is observed with HIS capture, the pacing mA will then be decreased until a wide complex is...
What are we doing? A 35-year-old patient is in the EP lab with complaints of palpitations. A two-catheter study is being performed with a decapolar CS and a deflectable quad for the His and RV applications. What test is being performed in the following...
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...
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