Electrogram Interpretation – 12

  This electrogram was recorded during a cryoballoon PVI procedure. The PV catheter (Achieve) is in the LIPV. What rhythm is observed in the following electrogram?  1.  Atrial Tachycardia 2.  Atrial Fibrillation 3.  Sinus Rhythm 4.  Junctional Answer Sinus Rhythm...

3D Map Interpretation – 5

Identify the view and anatomy in this Acutus image of the LA.      Answer This is a PA view of the left atrium. We are observing the posterior wall and pulmonary veins, the left atrial appendage is also able to be seen.   Propagation Map: In this same...

Electrogram Interpretation – 11

This week’s electrogram interpretation:    What is the most likely rhythm?      Answer Junctional     Notice how all of the A’s and V’s appear to line up and happen at approximately the same time. If the impulse originates for the...

AV Junction – What’s Your Function?

Think back to your elementary school days, and I’m sure you will easily be able to recall Schoolhouse Rock. The classic Jack Sheldon favorites helped me understand everything from grammar through history and government. Today, let’s begin breaking down the AV junction...

3D Map Interpretation – 4

Identify the view, anatomy, type of map, and interpretation of the following 3D image.      Answer This is an LAT map of the RA from a Rhythmia system. The image is viewed from the AP slightly caudal perspective. The cavotricuspid isthmus (CTI) is displayed, but...