Second degree AV block 2:1

A 2:1 second degree AV block means that the AV node is only working intermittently to transmit the impulse through to the ventricles. This causes every second P wave not to have a QRS complex following it.

See also: AV Blocks

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References

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In the ECGquest archives, this ECG has been tagged with: - Chest pain Dyspnoea Bradycardia Left Axis Deviation Extra P waves Second degree AV block 2:1 12-Lead 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 Dyspnoea Bradycardia Irregular Left Axis Deviation Tall QRS Wide QRS Second degree AV block 2:1 Ventriculophasic sinus arrhythmia 12-Lead ECG of the Week Dr John Larkin CC-BY-NC-SA
ECG of the Week – 12th March 2018 – Interpretation

This ECG is from a man in his 70s who presented with a 3 week history of progressive shortness of breath and occasional chest heaviness.

In the ECGquest archives, this ECG has been tagged with: - Left Axis Deviation Tachycardia Discordant ST changes Wide QRS Wide complex tachycardia LBBB Second degree AV block 2:1 12-Lead ECG of the Week Dr John Larkin CC-BY-NC-SA
ECG of the Week – 12th January 2015 – Interpretation

This ECG is from a woman in her 70s.

This ECG shows a regular wide complex tachycardia likely supraventricular with 2:1 conduction and LBBB morphology. ST segments are appropriately discordant.