Right bundle branch block
An ECG at Age 78
ECG from a 78-year-old woman. Symptoms and the reason for recording are not supplied.
Look for
- Broad QRS complexes with RBBB morphology.
- Positive terminal deflection in V1.
- Broad terminal S wave in lateral leads.
Where to look. Compare V1–V2 with I and V6; check overall QRS duration.
The right ventricle activates later, widening the QRS and changing its terminal portion. Combine duration and morphology; a small isolated r′ is insufficient.
The source reports QRS duration of 130 ms and rate of 74/min; no RBBB cause is supplied.
References & provenance
The ECG Made Easy, 9e, ch. 3, PDF 77–83; The ECG Made Practical, 7e, ch. 1, p. 27; Lilly, 6e, ch. 4, p. 92–94.
ECG NSR with RBBB 74 bpm.jpg — Ewingdo — Wikimedia Commons — CC BY-SA 4.0 — https://commons.wikimedia.org/wiki/File:ECG_NSR_with_RBBB_74_bpm.jpg. Indiquer toute modification. CC BY-SA 4.0
Adaptation: cropping and removal of headers/annotations outside the tracing where applicable; metadata removed. Waveforms have not been redrawn.
Compared with the published source; no independent clinical validation is claimed.
Original annotations & limitations
Rythme sinusal avec BBD
ECG of a 78-year-old female with normal sinus rhythm and right bundle branch block. The heart rate is 74 bpm. QRS width 130 ms. QT/QTc 432/479 ms.
Notion facultative; QRS 130 ms documenté, à contrôler manuellement avant une question quantitative.