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Then, the current flows to an area known as the bundle of His, which divides into two branches (LBB and RBB) and is the only physiological pathway connecting the atria with the ventricles. AFIB/AFL – atrial fibrillation or atrialflutter episodes. An abnormal electrocardiogram can mean many things.
The rhythm differential for narrow, regular, and tachycardic is sinus rhythm, SVT (encompassing AVNRT, AVRT, atrial tach, etc), and atrialflutter (another supraventricular rhythm which is usually considered separately from SVTs). Therefore this patient is either in some form of SVT or atrialflutter. If so, why?
The ECG was interpreted as showing atrialflutter with 2:1 conduction. The heart rate could be compatible with that of a 2:1 conducted atrialflutter. Also, lead I could give the initial impression of showing flutter waves. The patient’s own underlying atrial rhythm is revealed at a heart rate in the mid 50s.
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