Arrhythmia Atrial Flutter Ischemia 
Dr. Smith's ECG Blog
NOVEMBER 26, 2018
The rhythm differential for narrow, regular, and tachycardic is sinus rhythm, SVT (encompassing AVNRT, AVRT, atrial tach, etc), and atrial flutter (another supraventricular rhythm which is usually considered separately from SVTs). Therefore this patient is either in some form of SVT or atrial flutter.
Dr. Smith's ECG Blog
DECEMBER 24, 2023
Atrial flutter with 2:1 conduction. The atrial flutter rate is approximately 200 bpm, with 2:1 AV conduction resulting in ventricular rate almost exactly 100 bpm. Further history revealed she had new onset atrial flutter soon after her aortic surgery, and was put on flecainide approximately 1 month ago.
Dr. Smith's ECG Blog
MAY 1, 2023
This narrows our differential for the rhythm down to sinus tachycardia, paroxysmal supraventricular tachycardia (PSVT, or SVT), and atrial flutter. The patient’s history is notable for paroxysmal atrial fibrillation, which raises clinical suspicion for atrial flutter, since these two entities frequently coexist on a spectrum.
Dr. Smith's ECG Blog
JULY 16, 2024
Here I put arrows: Arrows shows slow atrial flutter waves. Arrhythmia? Today’s case recalled that scenario for me, in that it features recognition of an arrhythmia that fooled ED staff into thinking the ECG was showing an acute infarction. These mimic ST Elevation. But there is no STE. Would you give lytics?
Dr. Smith's ECG Blog
JANUARY 9, 2024
The ECG was interpreted as showing atrial flutter with 2:1 conduction. Are you confident there is no ischemia? The heart rate could be compatible with that of a 2:1 conducted atrial flutter. Also, lead I could give the initial impression of showing flutter waves. Do you agree with this strategy?
Dr. Smith's ECG Blog
AUGUST 3, 2018
Re-entrant tachycardias (atrial flutter, PSVT, AVRT, VT) have constant regular heart rates, whereas sinus tachycardia will usually gradually change rate with differing conditions (for instance, after infusion of fluid and BP increase, sinus tach rate might decrease from 130 to 125, for instance). So there is a re-entrant rhythm.
Ken Grauer, MD
MARCH 23, 2023
A series of cardiac arrhythmias were seen during the course of her resuscitation — including the interesting arrhythmia shown in the long lead II of Figure-1. At about this point in the process — I like to take a closer LOOK at the 12-lead tracing, to ensure there is no acute ischemia or infarction that might need immediate attention.
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