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.

Featured Example

References

Related

  • See also: Regularity
  • Arrest Rhythms:
  • Fibrillation and flutter:

ECG Library (91)

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In the ECGquest archives, this ECG has been tagged with: - Chest pain Dyspnoea 12-Lead Irregular Narrow QRS Tachycardia Tall QRS Widespread ST depression Atrial fibrillation ECG Interpretation CC-BY-NC-SA
ECG Blog #166 (ST-T – AFib – LVH – SVT)

This ECG is from a woman in her 60s who presented in acute heart failure with dyspnoea and intermittent chest discomfort.

This ECG shows atrial fibrillation, LVH and diffuse ST-T changes.

In the ECGquest archives, this ECG has been tagged with: - Loss of consciousness Seizure 12-Lead Irregular Narrow QRS Wide QRS Atrial fibrillation Change in rhythm Dr Smith's ECG Blog CC BY-NC
What is this tachycardia that alternates from wide to narrow to wide?

This ECG is from a patient in their 50s who presented unconscious and tachycardic after a seizure.

This ECG shows alternating wide and narrow complex tachycardias at the same rate, likely due to aberrancy.

In the ECGquest archives, this ECG has been tagged with: - 12-Lead Irregular Sinus arrhythmia 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 12-Lead Bradycardia Irregular Peaked T waves Wide QRS Hyperkalemia Dr Smith's ECG Blog 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 12-Lead Absent P waves Bradycardia Hidden P waves Irregular Narrow QRS Normal Axis Short PR Change in rhythm Junctional escape Multiple rhythms Sinus arrhythmia Sinus bradycardia Dr Smith's ECG Blog 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: - 12-Lead Irregular Normal rate Tall U waves Wide QRS Atrial fibrillation Hypokalemia 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 12-Lead Nonspecific baseline artefact Bradycardia Extra P waves Irregular Peaked T waves Wide QRS Second degree AV block Hyperkalemia Dr Smith's ECG Blog 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: - 12-Lead Absent P waves Bradycardia Irregular Normal Axis RSR' Wide QRS Atrial fibrillation 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 12-Lead Anterior ST elevation Irregular J wave Widespread ST elevation Atrial fibrillation Normal ST elevation 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: - Abdominal pain 12-Lead Irregular Short QRS Atrial fibrillation ECG of the Week CC-BY-NC-SA
ECG of the Week – 4th June 2018 – Interpretation
In the ECGquest archives, this ECG has been tagged with: - Cardiac arrest 12-Lead Absent P waves Anterior ST depression Inferior ST depression Irregular Late R wave transition Lateral ST elevation Left Axis Deviation Acute Lateral MI ECG of the Week 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 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

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

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