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 109

ECG 109


Basic rhythm

Sinus rhythm, regular at 69 bpm.

P waves


PR interval



Normal duration and axis.

ST segment

In the left precordial leads, J-point elevation followed by ST segment elevation with superior concavity.

T waves

Symmetrical with relatively large amplitude.

QT interval



ST segment elevation.


Early repolarisation


The repolarisation changes, which are clearly visible in the left precordial leads, are a variation of normal ECG results, often seen in young people, particularly young black people.


Various cardiopathy


Reading level

1 / 3