First degree AV block

A first degree AV block means that the node works slowly but each impulse gets through eventually. There will be a long PR interval (>200 msec or 5 small squares at standard settings).

See also: AV Blocks

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References

ECG Library (34)

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In the ECGquest archives, this ECG has been tagged with: - Syncope 12-Lead Left Axis Deviation Long PR Normal rate RSR' Wide QRS First degree AV block LAFB RBBB Trifascicular block ECG of the Week CC-BY-NC-SA
ECG of the Week – 26th November 2018 – Interpretation

This ECG is from a man in his 60s who presented after an episode of syncope.

This ECG shows bifascicular block (RBBB + LAFB) with a first degree AV block. He underwent pacemaker insertion.

In the ECGquest archives, this ECG has been tagged with: - Chest pain 12-Lead Left Axis Deviation Long PR Pathological Q waves Regular Wide QRS First degree AV block RBBB ECG Guru CC-BY-NC-SA
Instructors’ Collection ECG: Right Bundle Branch Block With Probable Previous M.I.

This ECG is from an 87 year old man who presented with chest discomfort.

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).
In the ECGquest archives, this ECG has been tagged with: - Chest pain 12-Lead Long PR Wide QRS First degree AV block Interventricular conduction defect Dr Smith's ECG Blog CC BY-NC
A 50-something with h/o coronary bypass has chest pain and a ventricular paced rhythm

This ECG is from a man in his 50s who presented with chest pain on a background of previous CABG and dual chamber pacemaker.

This ECG shows sinus rhythm with first degree AV block and IVCD.

In the ECGquest archives, this ECG has been tagged with: - 12-Lead Incorrect Machine Interpretation RSR' Wide P waves Wide QRS First degree AV block RBBB ECG Guru CC-BY-NC-SA
Right Bundle Branch Block With Machine Interpretation Error | ECG Guru – Instructor Resources
In the ECGquest archives, this ECG has been tagged with: - Dyspnoea 12-Lead Long PR First degree AV block Dr Smith's ECG Blog CC BY-NC
A Healthy 50-something with new dyspnea on exertion and an interesting ECG