Figure: ECG Atrial flutter with 2/1 AV block

Introduction

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85 yrs       Male     BP 127/58

PR
QRS:  94      Atrial flutter with 2:1 AV block
QT:  324      Atrial rate 300. Ventricular rate 150.
QTc: 512

 Axes        LVH with ST-T abnormalities. LVH voltage
             Inferior infarct?, Q's in III, aVF
P:
QRS: -12
T:   207

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