Sinus arrhythmia

Sinus arrhythmia resembles a normal sinus rhythm except that the beat-to-beat rate varies with respiration. It is often seen in young people.

See also: Sinus Rhythms

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ECG Library (21)

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In the ECGquest archives, this ECG has been tagged with: - Chest pain 12-Lead Lateral ST depression Sinus arrhythmia Acute Inferior MI Dr Smith's ECG Blog CC BY-NC
A 40 yo with Chest pain. Only ECG abnormality is minimal ST depression in I and aVL (computer interpretation: normal)

This ECG is from a man in his 40s who presented with 1 hour of chest pain.

This ECG shows sinus arrhythmia with slight ST depression in I and aVL. Serial ECGs showed evolution to an inferior STEMI, due to a 100% RCA occlusion.

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: - 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: - Chest pain 12-Lead LA/RA electrode reversal Extreme Axis Sinus arrhythmia ECG of the Week CC-BY-NC-SA
ECG of the Week – 15th October 2018 – Interpretation

This ECG is from a woman in her 40s who presented after an episode of chest pain.

In the ECGquest archives, this ECG has been tagged with: - Chest pain 12-Lead Wide P waves Sinus arrhythmia ECG of the Week CC-BY-NC-SA
ECG of the Week – 11th June 2018 – Interpretation
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
In the ECGquest archives, this ECG has been tagged with: - Syncope 12-Lead Sinus arrhythmia Myocardial Bridging ECG Interpretation CC-BY-NC-SA
ECG Blog #150 (J-Point – ST Elevation – Pericarditis – Myocardial Bridge – Peaked T Waves – Early Repolarization)

This ECG is from A 19 year old male presented after a syncopal episode.

In the ECGquest archives, this ECG has been tagged with: - 12-Lead Capture beat Grouped Sinus arrhythmia First degree AV block Second degree AV block ECG Interpretation CC-BY-NC-SA
ECG Blog #144 (Bradycardia – AV Block – Alternating BBB – High Grade).