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

Can you add to the information on this page?

This ECG Archive is an academic, non-commercial #FOAMed project aiming to crowdsource a free open access database of ECGs and signs. If you include your personal details such as your name you will be attributed for your contribution, unless you tell us that you don't want this to happen. Personal contact details such as email addresses will not be published but may be used to email you in reply. Full project details and participant information available here.

Featured Example

References

ECG Library (8)

Sort by:
TitleDate
ASCDESC
Show:
31230
Columns:
In the ECGquest archives, this ECG has been tagged with: - Chest pain Dyspnoea 12-Lead Bradycardia Extra P waves Left Axis Deviation Second degree AV block 2:1 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 12-Lead Bradycardia Irregular Left Axis Deviation Tall QRS Wide QRS Second degree AV block 2:1 Ventriculophasic sinus arrhythmia ECG of the Week 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: - Dizziness 12-Lead Bradycardia LBBB Second degree AV block 2:1 ECG of the Week CC-BY-NC-SA
ECG of the Week – 2nd January 2016 – Interpretation
In the ECGquest archives, this ECG has been tagged with: - 12-Lead Discordant ST changes Left Axis Deviation Tachycardia Wide QRS Wide complex tachycardia LBBB Second degree AV block 2:1 ECG of the Week 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.