Electrogram Interpretation – 8

This week’s electrogram interpretation:    What is observed in this electrogram with CS pacing?   Answer No Capture   This example demonstrates pacing at a fixed rate from CS 9,10.  Notice how the atrial signal appears before the pacing artifact. With...

Why didn’t I write that down?

The physician asks to repeat the pacing protocol that induced tachycardia… and you give them a blank stare. After the procedure, the dictating physician asks what the HV interval was… and you have no clue. This has most likely happened to all of us at one point in...

SVT Case Study

This patient is a 53-year-old female with a history of palpitations.  Baseline Recording What rhythm is observed in the following electrogram?  1.  AVNRT 2.  Atrial Tachycardia 3.  Sinus Rhythm 4.  Junctional Answer Sinus Rhythm   The activation sequence is high to...

Electrogram Interpretation – 7

This week’s electrogram interpretation:    What is observed in the following electrogram?  The ablation catheter is positioned in the LIPV during a pulmonary vein isolation procedure.    Answer Exit block – AT within the pulmonary vein.   ...

3D Map Interpretation – 2

Identify the rhythm and tachycardia mechanism in the following images. Also, where would the ablation be performed?  *Hint – This mapping system displays the earliest activation with white and the latest with purple *Hint – Displayed is the geometry of the...