Narrow QRS

narrow QRS complex is less than 2.5 mm (100 msec) at standard settings. If the complex is narrow, it must have originated from somewhere above the ventricles (supraventricular). This is because it can only be narrow by travelling through the ventricles on the normal conduction highways. Narrow complex rhythms can originate from the SA node, atria or the AV node / junction.

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In the ECGquest archives, this ECG has been tagged with: - 12-Lead Long QT Narrow QRS Normal Axis Normal PR Sinus tachycardia ECG Interpretation CC-BY-NC-SA
ECG Blog #152 (QTc – ECG Lists – Sinus Rhythm) 24493
In the ECGquest archives, this ECG has been tagged with: - Palpitations 12-Lead Inverted P waves Narrow QRS Normal Axis Normal rate Short PR Accelerated junctional rhythm ECG of the Week CC-BY-NC-SA
ECG of the Week – 30th April 2018 – Interpretation 19559

This ECG is from a man in his 70s who presented after an episode of palpitations at home. He had a past history of paroxysmal atrial fibrillation, CABG, diabetes and had undergone a MAZE procedure in the last 12 months.

In the ECGquest archives, this ECG has been tagged with: - 12-Lead Bradycardia Early R wave transition Narrow QRS Normal Axis Normal P waves Normal PR Tall QRS Sinus arrhythmia Sinus bradycardia ECG of the Week CC-BY-NC-SA
ECG of the Week – 23rd April 2018 – Interpretation 19435
In the ECGquest archives, this ECG has been tagged with: - Dizziness 12-Lead Irregular Left Axis Deviation Narrow QRS Normal rate Atrial fibrillation ECG of the Week CC-BY-NC-SA
ECG of the Week – 19th March 2018 – Interpretation 18853

This ECG is from a man in his 80s who presented with dizziness and an abnormal gait.

In the ECGquest archives, this ECG has been tagged with: - Chest pain 12-Lead Anterior ST elevation Inferior ST depression Narrow QRS Normal Axis Reciprocal ST depression Sinus bradycardia MINOCA ECG Guru CC-BY-NC-SA
Instructors’ Collection ECG: Myocardial Infarction With Non-obstructive Coronary Arteries | ECG Guru – Instructor Resources 18445

This ECG is from a man in his 30s who presented with non-radiating substernal chest pain. He did not have any known medical comorbidities and did not take any medications. On arrival to the Emergency Department he was hypertensive and bradycardic, but alert and ambulatory. Whilst in the ED he had an episode of ventricular fibrillation, was resuscitated and was sent to the cath lab - but his coronary arteries were clear.

In the ECGquest archives, this ECG has been tagged with: - 12-Lead Long QT Narrow QRS Regular Tachycardia Sinus tachycardia Hypokalemia Hypomagnesaemia Dr Smith's ECG Blog CC BY-NC
Alcohol withdrawal and sinus tachycardia 18338

This ECG is from a patient of unknown age who presented with alcohol withdrawl.

In the ECGquest archives, this ECG has been tagged with: - Chest pain 12-Lead Dagger Q waves Inferior ST depression Lateral ST depression Narrow QRS Normal Axis Normal PR Tall QRS Normal Sinus Rhythm Hypertrophic cardiomyopathy ECG of the Week CC-BY-NC-SA
ECG of the Week – 5th March 2018 – Interpretation 18321

This ECG is from a man in his 30s who presented to the Emergency Department following a brief episode of atypical chest pain.

In the ECGquest archives, this ECG has been tagged with: - Chest pain 12-Lead Absent P waves Anterior ST depression Inferior ST elevation Inverted T waves Irregular Narrow QRS Normal Axis Normal rate Reciprocal ST depression Tall QRS Atrial fibrillation Acute Inferior MI Acute Posterior MI ECG of the Week CC-BY-NC-SA
ECG of the Week – 19th February 2018 – Interpretation 18087

This ECG is from a man in his 50s who presented to the Emergency Department complaining of chest pain for 1 hour. He was an ex-smoker and had a history of hypertension and hypercholesterolaemia.

In the ECGquest archives, this ECG has been tagged with: - Chest pain 12-Lead Standard Calibration Inverted T waves Narrow QRS Normal Axis Normal P waves Normal rate Normal ST segment Regular Acute Posterior MI Dr Smith's ECG Blog CC BY-NC
Chest pain and a non-diagnostic ECG. No worries, right? 17867

This ECG is from a middle aged man presented with chest pain. This is the first prehospital ECG that was recorded.

In the ECGquest archives, this ECG has been tagged with: - Diarrhoea 12-Lead Standard Calibration Inferior ST depression Lateral ST depression Long QT Narrow QRS Normal Axis Normal PR Normal rate Regular Normal Sinus Rhythm Hypocalcaemia Hypomagnesaemia ECG of the Week CC-BY-NC-SA
ECG of the Week – 29th January 2018 – Interpretation 17731

This ECG is from a man in his 60s who presented with several weeks of diarrhoeal illness following overseas travel. He had a past medical history of ischaemic cardiomyopathy. His medications included warfarin, a beta-blocker, a PPI, an ACE inhibitor and diuretics.

In the ECGquest archives, this ECG has been tagged with: - 12-Lead Serial 12-lead Standard Calibration Narrow QRS Normal Axis Normal P waves Normal PR Normal rate Normal ST segment Normal T waves Normal Dr Smith's ECG Blog CC BY-NC
Is this ECG diagnostic of coronary occlusion? Also: Inferior de Winter’s T-waves on prehospital ECG?? Baseline ECG 17701

This ECG is from a man in his 50s presented with 1 hour of post exertional chest pressure associated with diaphoresis and nausea. He had a history of coronary artery disease, diabetes, and dyslipidemia.