Figure: ECG right bundle branch block (RBBB), left posterior hemiblock

Introduction

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69 yrs       Female

PR:  136
QRS: 138      Sinus arrhythmia, rate varies 45-81.
QT:  426      bifascicular block. RBBB and LPFB. RBBB with right axis deviation.
QTc: 446

 Axes

P:     58
QRS:  148
T:    -10

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