LPFB

A left posterior fascicular block will have right axis deviation, a small R in lead I and a small Q in lead III, in the absence of right ventricular hypertrophy.

See also: BBB/Hemiblocks

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References

ECG Library (9)

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In the ECGquest archives, this ECG has been tagged with: - 12-Lead Serial 12-lead Right Axis Deviation LPFB Dr Smith's ECG Blog CC BY-NC
ST elevation in aVL with reciprocal ST depression in the inferior leads – repeat after dialysis

This ECG is from a man in his 50s with a history of thyroid cancer was brought to the Emergency Department after being found minimally unresponsive with sonorous respirations on his couch at home. Blood glucose level was 76 mg/dL. EMS administered naloxone, which was followed quickly by hyperventilation but no improvement in mental status. EMS performed RSI at that time using etomidate and succinylcholine, but intubation was unsuccessful. Luckily, BVM ventilation was easy in this patient, and he was bagged on the way to the ED, with oxygen saturation maintained in the mid-90s. He was intubated immediately on arrival to the ED using ketamine and rocuronium. This was the repeat ECG after dialysis.

In the ECGquest archives, this ECG has been tagged with: - 12-Lead Serial 12-lead Wide QRS LPFB RBBB ECG of the Week CC-BY-NC-SA
ECG Blog #135 (Regular WCT) after shock
In the ECGquest archives, this ECG has been tagged with: - 12-Lead Anterior ST elevation Inferior ST depression Lateral ST elevation Right Axis Deviation Wide QRS LPFB RBBB Left main occlusion ECG Guru CC-BY-NC-SA
Acute Anterior-lateral M.I. With Right Bundle Branch Block and Left Posterior Fascicular Block
In the ECGquest archives, this ECG has been tagged with: - 12-Lead Right Axis Deviation LPFB RBBB ECG Guru CC-BY-NC-SA
Right Bundle Branch Block With Left Posterior Fascicular Block