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 112

ECG 112


Basic rhythm

Sinus rhythm at 85 bpm.

P waves

Normal. Pause without P waves of exactly twice the duration of the baseline PP interval.

PR interval




QT interval



Pause with a PP interval = exactly 2 baseline PP interval.


Intermittent Mobitz type 2 second degree sinoatrial block.


The duration of the pause, which is an exact multiple of the baseline PP interval, allows us to give this diagnosis.


Conduction abnormalities


Reading level

2 / 3