Left Axis Deviation

left axis deviation means that the overall direction of ventricular depolarisation is abormal and too far around towards the left shoulder. This direction can be between -30 degrees (up towards the left shoulder) to -90 degrees (vertically upwards) from horizontal. If the axis is leftward, Lead I will be positive, aVF negative and lead II negative. Left Axis Deviation can be caused by lots of things, including left ventricular hypertrophy, left bundle branch block, inferior MI, ventricular pacing, and others. The diagnosis of exclusion is left anterior fascicular block.

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In the ECGquest archives, this ECG has been tagged with: - 12-Lead Anterior ST elevation Fragmented QRS Left Axis Deviation ECG Interpretation CC-BY-NC-SA
ECG Blog #165 (MI – Acute – Old – Unknown Age – Aneurysm – Fragmentation)
In the ECGquest archives, this ECG has been tagged with: - Syncope 12-Lead Fragmented QRS Left Axis Deviation Regular Tachycardia ECG Guru CC-BY-NC-SA
Instructors’ Collection ECG : Syncope and tachycardia

This ECG is from a man in his 50s who presented with syncope on a background of diabetes, opiate abuse and possible prior cardiac disease.

This ECG shows a supraventricular tachycardia with evidence of P waves, left axis deviation and slightly wider QRS (106 msec) likely due to LAFB, tall QRS concerning for LVH and fragmentation in V2-4 suggesting prior MI.

In the ECGquest archives, this ECG has been tagged with: - Syncope 12-Lead Left Axis Deviation Long PR Normal rate RSR' Wide QRS First degree AV block LAFB RBBB Trifascicular block ECG of the Week CC-BY-NC-SA
ECG of the Week – 26th November 2018 – Interpretation

This ECG is from a man in his 60s who presented after an episode of syncope.

This ECG shows bifascicular block (RBBB + LAFB) with a first degree AV block. He underwent pacemaker insertion.

In the ECGquest archives, this ECG has been tagged with: - 12-Lead Left Axis Deviation Bifascicular block LAFB RBBB ECG Guru CC-BY-NC-SA
Instructors’ Collection ECG: Bifascicular Block

This ECG is from a woman in her 70s who presented with sepsis.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Dyspnoea 12-Lead Bradycardia Extra P waves Left Axis Deviation Second degree AV block 2:1 ECG of the Week CC-BY-NC-SA
ECG of the Week – 29th October 2018 – Interpretation

This ECG is from a woman in her 80s who presented with intermittent chest pain and dyspnoea.

In the ECGquest archives, this ECG has been tagged with: - Chest pain 12-Lead Anterior ST elevation Left Axis Deviation Long PR Normal rate Regular Acute Anterior MI ECG of the Week CC-BY-NC-SA
ECG of the Week – 22nd October 2018 – Interpretation
In the ECGquest archives, this ECG has been tagged with: - Chest pain Dyspnoea 12-Lead Electrode misplacement Lateral ST elevation Left Axis Deviation LAFB RBBB Acute Anterior MI Acute Lateral MI Dr Smith's ECG Blog CC BY-NC
A man in his 80s with chest pain

This ECG is from a man in his 80s who presented with chest pain and shortness of breath. This was the repeat ECG just before he arrested.

In the ECGquest archives, this ECG has been tagged with: - Chest pain 12-Lead Left Axis Deviation Long PR Pathological Q waves Regular Wide QRS First degree AV block RBBB ECG Guru CC-BY-NC-SA
Instructors’ Collection ECG: Right Bundle Branch Block With Probable Previous M.I.

This ECG is from an 87 year old man who presented with chest discomfort.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Dyspnoea 12-Lead Excessive discordant ST depression. Excessive discordant ST elevation Left Axis Deviation R in aVR Regular Tachycardia Wide QRS Ventricular tachycardia Acute Lateral MI Acute Posterior MI Dr Smith's ECG Blog CC BY-NC
Posterolateral OMI resulting in VT, then R-on-T phenomenon and VF – repeat after sudden worsening of shortness of breath.

This ECG is from a man in his 50s who presented with 1 hour of chest pain and shortness of breath. This was his second ECG after he suddenly became more short of breath.

In the ECGquest archives, this ECG has been tagged with: - Chest pain 12-Lead Nonspecific baseline artefact Serial 12-lead Anterior ST elevation Hyperacute T waves Left Axis Deviation Sinus bradycardia Acute Anterior MI Dr Smith's ECG Blog CC BY-NC
A Tale of 2 Occlusions in the Same Patient: one with Expert ECG interpretation, the Other Without – fourth repeat ECG on day 2

This ECG is from a man in his 40s who presented with chest discomfort and diaphoresis since waking a few hours earlier, on a background of prior infarction with PCI years ago, active smoking, high cholesterol and hypertension. This was the repeat ECG on day 2, after pain returned with nausea and diaphoresis that was exactly like his initial pain.

In the ECGquest archives, this ECG has been tagged with: - Chest pain 12-Lead Nonspecific baseline artefact Serial 12-lead Anterior ST elevation Hyperacute T waves Left Axis Deviation Straightened ST segment Acute Anterior MI Dr Smith's ECG Blog CC BY-NC
A Tale of 2 Occlusions in the Same Patient: one with Expert ECG interpretation, the Other Without -fifth repeat ECG on day 2, after morphine

This ECG is from a man in his 40s who presented with chest discomfort and diaphoresis since waking a few hours earlier, on a background of prior infarction with PCI years ago, active smoking, high cholesterol and hypertension. This was the repeat ECG on day 2, after pain returned with nausea and diaphoresis that was exactly like his initial pain and did not resolve with morphine.

In the ECGquest archives, this ECG has been tagged with: - Chest pain 12-Lead Bradycardia Left Axis Deviation Sinus bradycardia Dr Smith's ECG Blog CC BY-NC
A Tale of 2 Occlusions in the Same Patient: one with Expert ECG interpretation, the Other Without

This ECG is from a man in his 40s who presented with chest discomfort and diaphoresis since waking a few hours earlier, on a background of prior infarction with PCI years ago, active smoking, high cholesterol and hypertension. This ECG was taken after aspirin just as he had significant relief from the pain.

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