ECG Directory

Welcome to this interactive ECG course.

Although it is one of the oldest paraclinic exams, dating back to the late 19th century, the ECG is still of crucial clinical use. This examination often still poses problems of interpretation to the medical practitioner.

This course aims to help the student, the practicing physician and even the trained cardiologist to improve his knowledge in electrocardiography. It consists of 250 traces of varying complexity with a description of each one by experts. This allows the reader to compare his analysis with that of the experts. In addition, the areas of interest of the ECG can be activated to be clearly highlighted.

We hope that these plots will be useful to readers and will improve their knowledge.

The ECGs are available sorted by keywords and categories.

ECG 095

ECG 095


Basic rhythm

Sinus rhythm at 75 bpm.

P waves


PQ interval



Duration 140 ms. rSR' pattern in V1. Left axis - 45°.

QT interval



rSR' aspect.
Left axis deviation.


Complete right bundle branch block (RBBB). Left anterior hemiblock.


On this trace a complete right bundle branch block is combined with a left axis deviation. This is absolutely typical of the type of bifascicular block most frequently encountered in clinical practice.


Conduction abnormalities


Reading level

1 / 3