Irregular

In an irregular rhythm, the beats are no equally spaced apart and there are no obvious groupings of beats. Some examples of irregular rhythms can include Atrial Fibrillation, Flutter with variable conduction, or ectopic beats disrupting a regular rhythm.

See also: Regularity

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In the ECGquest archives, this ECG has been tagged with: - Irregular Sinus arrhythmia 12-Lead ECG Guru CC-BY-NC-SA
Instructors’ Collection ECG: Irregular Rhythm in a Young Person

This ECG is from a healthy teenage male who presented with an irregular pulse.

This ECG shows sinus arrhythmia

In the ECGquest archives, this ECG has been tagged with: - Cardiac arrest Bradycardia Irregular Peaked T waves Wide QRS Hyperkalemia 12-Lead Dr Smith's ECG Blog Dr Ken Grauer K. Wang CC BY-NC
A patient with cardiac arrest, ROSC, and right bundle branch block (RBBB).

This ECG is from a patient who presented after a PEA arrest with ROSC after intubation and chest compressions.

This ECG shows irregular, slow, wide complex rhythm with peaked T waves due to hyperkalemia.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Dyspnoea Bradycardia Irregular Normal Axis Absent P waves Hidden P waves Narrow QRS Short PR Change in rhythm Junctional escape Multiple rhythms Sinus arrhythmia Sinus bradycardia 12-Lead Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
What is the Rhythm?

This ECG is from a young man who presented shortly after a 45 min episode of palpitations, shortness of breath, chest pressure and presyncope. He was an athlete.

This ECG shows marked sinus bradycardia with AV dissociation by default (not AV block) with junctional escape beats.

In the ECGquest archives, this ECG has been tagged with: - Irregular Normal rate Tall U waves Wide QRS Atrial fibrillation Hypokalemia 12-Lead Dr Smith's ECG Blog CC BY-NC
Pre-existing Left Bundle Branch Block and Atrial Fib: what is alarming on this routine pre-procedure ECG?

This ECG is from an elderly patient who had a routine pre-procedure ECG.

This ECG shows atrial fibrillation with LBBB (old) and large U waves. The cause was hypokalemia.

In the ECGquest archives, this ECG has been tagged with: - Hypotension Bradycardia Irregular Nonspecific baseline artefact Extra P waves Peaked T waves Wide QRS Second degree AV block Hyperkalemia 12-Lead Dr Pendell Meyers Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
What will you do for this altered and bradycardic patient?

This ECG is from a woman in her 60s who presented from a nursing home with altered mental status, hypotension, hypoxia and bradycardia.

This ECG shows an irregular rhythm due to second degree AV block with wide QRS and peaked T waves. The cause was hyperkalemia.

In the ECGquest archives, this ECG has been tagged with: - Bradycardia Irregular Normal Axis Absent P waves RSR' Wide QRS Atrial fibrillation 12-Lead ECG of the Week CC-BY-NC-SA
ECG of the Week – 1st October 2018 – Interpretation

This ECG is from a man in his 80s who presented feeling generally unwell and nauseous, on a background of chronic atrial fibrillation, diabetes and hypertension.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Palpitations Irregular Anterior ST elevation J wave Widespread ST elevation Atrial fibrillation Normal ST elevation 12-Lead Dr Smith's ECG Blog CC BY-NC
Palpitations and Chest Tightness: Should You Activate the Cath Lab (or Give Thrombolytics)?

This ECG is from a man in his 20s with palpitations and chest tightness on a background of Wolff Parkinson White syndrome.

In the ECGquest archives, this ECG has been tagged with: - Cardiac arrest Irregular Left Axis Deviation Absent P waves Anterior ST depression Inferior ST depression Late R wave transition Lateral ST elevation Acute Lateral MI 12-Lead ECG of the Week Dr John Larkin CC-BY-NC-SA
ECG of the Week – 26th March 2018 – Interpretation

This ECG is from a man in his 40s who had a cardiac arrest out of hospital. He regained cardiac output on the way to the Emergency Department.

In the ECGquest archives, this ECG has been tagged with: - Dizziness Irregular Left Axis Deviation Normal rate Narrow QRS Atrial fibrillation 12-Lead ECG of the Week Dr John Larkin CC-BY-NC-SA
ECG of the Week – 19th March 2018 – Interpretation

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

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