How would you differentiate a conversion from SR to Atrial Flutter vs. AVRT/AVNRT? I work as a cardiac monitor tech, I had a patient who went from SR in the 70s to having HRs in the 180s. How would I tell the difference between AVRT/AVNRT and Flutter? Thanks for the video!! It's really interesting taking a deeper look into all of this.
Great question! It's difficult to determine between the two especially if the P waves are not evident. If the P waves are clearly retrograde and you don't see multiple P waves between the R-R interval, then you would know it is AVNRT. However, that's not always obvious once the heart rate gets that high. Based solely on heart rate you can't tell the difference between the two because AFlutter could be at 180bpm instead of 150bpm with 2:1 block if the cycle length is longer. So it would be hard to just know on telemetry. The next step would be to look at a 12 lead ECG.
Good video! Thank you. Maybe put sound a bit higher next, had to put headphones on (im inside) Really like the managment-driven touch, will watch the rest of the series. note: in tachycardia we can't know if it's a WPW (unless very large QRS or precedent) neither if its AVNRT vs AVRT when no p wave..right?
If your heart is beating at 300bpm like in the example, does that give enough time for the heart to properly fill and pump out the blood? Would you even still be conscious? Just diagnosed with WPW.
Great question! If a heart is beating at 300 bpm you are correct, it would not allow enough time during diastole for filling the left ventricle with enough blood and most people lose consciousness rather quickly. As for your diagnosis, I would definitely recommend following up with a cardiology and electrophysiologist to discuss your diagnosis and treatment further.
![SVT (AVRT, AVNRT) | For DO, MD, NP, PA [Part 3]](/img/logo.svg){kind=logo}
