ECG Quest > Shapes > PR interval & segment > Long PR

Long PR

A long PR interval is more than 5 mm (200 ms) at standard settings. This is usually caused by a conduction block (or delay) at the AV node.

See also: PR interval & segment

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In the ECGquest archives, this ECG has been tagged with: - Long PR Long QT Wide QRS Hyperkalemia Hypocalcaemia 12-Lead ECG of the Week CC-BY-NC-SA
ECG of the Week – 31st December 2018 – Interpretation

This ECG is from a woman in her 30s who presented with cramping following thyroid surgery.

This ECG shows prolonged QT due to long ST segment, no U waves, but also a prolonged QRS and PR. There was hypocalcemia, mild hyperkalemia and hypermagnesemia.

In the ECGquest archives, this ECG has been tagged with: - Syncope Left Axis Deviation Normal rate Long PR RSR' Wide QRS First degree AV block LAFB RBBB 12-Lead 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 Left Axis Deviation Normal rate Regular Anterior ST elevation Long PR Acute Anterior MI 12-Lead ECG of the Week CC-BY-NC-SA
ECG of the Week – 22nd October 2018 – Interpretation
In the ECGquest archives, this ECG has been tagged with: - Chest pain Left Axis Deviation Regular Long PR Pathological Q waves Wide QRS First degree AV block RBBB 12-Lead 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: - Chronic kidney disease Long PR Hyperkalemia 12-Lead Dr Pendell Meyers Dr Smith's ECG Blog CC BY-NC
The blood sample is hemolyzed. Twice. Is there hyperkalemia on the ECG?

This ECG is from a patient on haemodialysis for renal failure.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Long PR Wide QRS First degree AV block Interventricular conduction defect 12-Lead 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: - Dyspnoea Long PR First degree AV block 12-Lead Dr Smith's ECG Blog CC BY-NC
A Healthy 50-something with new dyspnea on exertion and an interesting ECG