What are we doing?? Tachycardia is displayed on the right half of the electrogram, and the differential pacing attempt is on the left. Where do we even begin? Where are we pacing? What type of pacing? Did we capture? What maneuver is being performed?...
What is the rhythm? Answer: This is atrial flutter. Notice the regular atrial rate and that there are more atrial events than ventricular. We can also see that the CS is depolarizing from proximal to distal. Is this typical AFL? How do you know? How can...
The BIG 5 – are you confused? There are five SVTs that we often talk about in EP. SVT meaning supraventricular tachycardia, so simply a fast rate that is occuring above the ventricles. This includes atrial fibrillation (AF), atrial flutter (AFL), AV nodal...
How do we determine success? A patient undergoing PVI (pulmonary vein isolation) for paroxysmal atrial fibrillation is in the lab. After completion of the WACA (wide area circumferential ablation), there was remaining signal in the left superior pulmonary vein. The...
What are we looking at? How would you interpret the following electrogram? Is it completely normal, just here to get you thinking? Is there pacing? If so, from which site? Did it capture & conduct? Anything other observations? Answer: In this...