Figure: ECG multifocal atrial tachycardia with pacemaker

Introduction

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          Male     BP 141/89

PR:  132
QRS: 138      Multifocal atrial tachycardia.  Different p-wave morphologies.
QT:  345      Electronic pacemaker. AV sequential. Normal capture.
QTc: 449

 Axes

P:
QRS: 118
T:   210

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