LBBB

A left bundle branch block is defined by a wide QRS (> 120 msec), a dominant S wave in V1 and a slurred R wave in V6.

See also: BBB/Hemiblocks

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References

65 ECGs found. Sort by:
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In the ECGquest archives, this ECG has been tagged with: - Abdominal pain Discordant ST changes Tall QRS Wide QRS LBBB 12-Lead ECG of the Week CC-BY-NC-SA
ECG of the Week – 5th November 2018 – Interpretation

This ECG is from a man in his 70s who presented with epigastric pain on a background of hypertension.

This ECG shows LBBB and occasional PVCs with discordant changes that do not meet Sgarbossa criteria. The patient self-discharged against advice before an echo could be completed for possible LVH.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Dyspnoea Tachycardia Fragmented QRS Normal P waves Wide QRS Sinus tachycardia Wide complex tachycardia LBBB 12-Lead Serial 12-lead Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
Sudden Chest pain and SOB with a Wide Complex Tachycardia: Repeat after unsynchronised cardioversion

This ECG is from a man in his 60s who presented with sudden onset severe chest pain and dyspnoea. He had no medical history or medications. On arrival he was in extremis with altered mentation, cyanosis and diaphoresis . There was no palpable radial pulse. Pulse oximetry read HR 170 and saturation 53%. This was the repeat ECG after unsynchronised cardioversion.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Dyspnoea Tachycardia Fragmented QRS Wide QRS Wide complex tachycardia LBBB 12-Lead Serial 12-lead Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
Sudden Chest pain and SOB with a Wide Complex Tachycardia

This ECG is from a man in his 60s who presented with sudden onset severe chest pain and dyspnoea. He had no medical history or medications. On arrival he was in extremis with altered mentation, cyanosis and diaphoresis . There was no palpable radial pulse. Pulse oximetry read HR 170 and saturation 53%. This was the initial ECG.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Excessive discordant ST elevation LBBB Acute Inferior MI Positive Sgarbossa criteria 12-Lead Dr Pendell Meyers Dr Smith's ECG Blog CC BY-NC
A 60-something year old man with chest pain and a wide QRS

This ECG is from a man in his 60s who presented with chest pain for several hours on a background of prior coronary artery disease and hypertension.

This ECG shows LBBB with excessively discordant ST elevation in inferior leads with reciprocal changes in I and aVL. The cause was a RCA in-stent restenosis.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Normal Axis Excessive discordant ST elevation Reciprocal ST depression LBBB Acute Lateral MI 12-Lead Dr Smith's ECG Blog CC BY-NC
Left Bundle Branch Block, Severe Chest pain, Previous Normal Angio. What is going on? Repeat ECG 24 min later.

This ECG is from a middle aged woman who presented with sudden severe substernal chest pain on a background of idiopathic cardiomyopathy and biventricular failure.

This ECG shows LBBB (not paced rhythm) with excessive discordant ST elevation in III and aVF with reciprocal change in aVL. The cause was an acute lateral MI, likely due to embolism from a left atrial appendage thrombus.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Electrode misplacement Normal Axis LBBB 12-Lead Dr Smith's ECG Blog CC BY-NC
Left Bundle Branch Block, Severe Chest pain, Previous Normal Angio. What is going on?

This ECG is from a middle aged woman who presented with sudden severe substernal chest pain on a background of idiopathic cardiomyopathy and biventricular failure.

This ECG shows LBBB (not paced rhythm) with probable swapped limb electrodes but no ECG evidence of ischemia. The patient was monitored and later developed diagnostic changes of an acute lateral MI, likely due to embolism from a left atrial appendage thrombus.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Standard Calibration Concordant ST elevation Normal Sinus Rhythm LBBB Acute Inferior MI Acute Lateral MI 12-Lead Dr Pendell Meyers Dr Smith's ECG Blog CC BY-NC
Is there Wellens’ syndrome in left bundle branch block? Or in inferior and lateral leads?

This ECG is from a man in his 80s who presented with acute chest pain.

This ECG shows LBBB with concordant STE in II, V5 and V6 due to inferior and lateral MI.

In the ECGquest archives, this ECG has been tagged with: - Coved ST elevation ST elevation in aVL Normal Sinus Rhythm LBBB 12-Lead ECG Interpretation Dr Ken Grauer CC-BY-NC-SA
ECG Blog #146 – (BBB – Primary ST-T Changes)

This ECG is from a patient of unknown age who presented with acute chest pain.

This ECG shows LBBB with concordant ST changes in III, aVF and aVL most likely due to acute MI. The patient was not sent to the cath lab. They arrested and could not be resuscitated.

In the ECGquest archives, this ECG has been tagged with: - Normal Axis Normal P waves Short PR Wide QRS Wide complex tachycardia LBBB 12-Lead ECG of the Week Dr John Larkin CC-BY-NC-SA
ECG of the Week – 1st January 2018 – Interpretation 2

This ECG is from a woman in her 20s with a known history of pre-excitation and prior ablation.

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