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 038

ECG 038


Basic rhythm

Sinus rhythm at 75/min.

P waves


PQ interval

Constantly prolonged, increasing until a blocked P wave.


Normal but with a delayed progression of the R wave in the precordial leads.

T waves

Negative from V1 to V3.


Blocked P wave.
Prolonged PR interval.


Second degree Wenckebach-type A-V block (Mobitz type 1). Juvenile-type repolarisation disturbances.


In the absence of cardiopathy, the T waves, which are negative up to V3, can be considered to be a persistant juvenile form in this case (29 year-old patient).


Conduction abnormalities


Reading level

1 / 3