ECG of the month. Narrow QRS tachycardia with group beating. Atrial flutter with atrioventricular block at 2 levels: 2:1 above and 4:3 type I block (Wenckebach) below (Figure 2), left axis deviation.
Glancy
D Luke
DL
Department of Medicine, Louisiana State University Health Sciences Center, New Orleans, USA.
Jones
Brian P
BP
D001282:Atrial Flutter / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology; D054537:Atrioventricular Block / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology; D004418:Dyspnea, Paroxysmal / Q000209:etiology*; D004562:Electrocardiography; D006801:Humans; D008297:Male; D008875:Middle Aged; D013610:Tachycardia / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology