2020 Atrial Flutter Dysrhythmia 
Dr. Smith's ECG Blog
OCTOBER 25, 2022
The differential of a regular narrow QRS tachycardia is sinus tachycardia, SVT, and atrial flutter with regular conduction. There are no P waves preceding the QRS complexes, and no clear flutter waves. But adenosine only lasts for seconds, and if the dysrhythmia recurs, then the adenosine is gone. Adenosine worked.
Dr. Smith's ECG Blog
SEPTEMBER 7, 2020
The Differential Diagnosis is: SVT with aberrancy(#) [AVNRT vs. WPW (also called AVRT*)] Atrial flutter with 1:1 conduction, with aberrancy VT coming from the anterior fascicle ( fascicular VT )@ *AVRT = AV Reciprocating Tachycardia (Tachycardic loop that uses both the AV node and an accessory pathway.
Dr. Smith's ECG Blog
JANUARY 5, 2020
Atrial dysrhythmias, and atrial fi brillation in particular, are frequently misdiagnosed by computer algorithms and then by the physician who overreads them. of all cases, and 62% of Veritas® misdiagnoses). == MY Comment , by K EN G RAUER, MD ( 1/5/2020 ): == This case illustrates a number of important teaching points.
Dr. Smith's ECG Blog
MARCH 6, 2020
There is atrial activity before every QRS, but that activity has negative polarity, so it is not sinus rhythm. There are clearly no flutter waves, so it is not atrial flutter (a "macro-reentrant" atrial tachycardia) Is it AVNRT originating at the superior pole of the AV node, resulting in a retrograde P-wave before the QRS?
Dr. Smith's ECG Blog
MARCH 6, 2025
Sinus tach is often misinterpreted as a dysrhythmia. Possible but, again, the QRS morphology is atypical 3) Atrial Flutter with 2:1 conduction and "aberrancy". I do not see flutter wave baseline, and again the QRS morphology is not typical for a supraventricular rhythm. 2) PSVT with "aberrancy" (atypical RBBB+LAFB).
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