Figure: ECG Atrial flutter with 6/1 AV block & left bundle branch block

Introduction

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63 yrs     Female     BP 150/50

PR
QRS: 147      Atrial flutter with 6:1 AV block.
QT:  640      Atrial rate 312. Ventricular rate 52.
QTc: 595      Long QTc

 Axes        Left bundle branch block. QRS > 120 ms. Terminal forces left.

P:
QRS: -44
T:   113

Courtesy of Kerala Serio, M.D. UCSF Fresno.