Electrogram Interpretation – 22

This week’s electrogram interpretation:  This patient is in the lab for an SVT study. A four-catheter EP study was performed with the catheters in the standard locations. The following series of electrograms were recorded during baseline extra-stimulus testing. ...

Electrogram Interpretation – 17

This week’s electrogram interpretation:    What is observed throughout the following electrogram?  Two quadripolar catheters are being utilized. One is locate near the His bundle (although no H is observed), and the second is in the RV.  *Bonus – Are...

Electrogram Interpretation – 9

This week’s electrogram interpretation:    What is observed in this electrogram with decremental CS pacing?     Answer Accessory Pathway Block   This example demonstrates decremental pacing from CS 9,10… pacing faster and faster by small...

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...