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 086

ECG 086


Basic rhythm

Sinus rhythm at 85 bpm.

P waves


PR interval



Axis -10 degrees. Showing atypical right bundle branch block.

ST segment

Elevated in V1, V2 and V3.

QT interval



ST segment elevation.


Probable Brugada syndrome.


The ST segment elevation in the first 3 precordial leads cannot be related to the atypical right bundle branch block, and Brugada syndrome should be suspected. This suspicion must be verified through a flecainide or ajmaline provocation test (see ECG 87).


Various cardiopathy


Reading level

1 / 3