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 035

ECG 035


Basic rhythm

Regular at 58 bpm.

P waves

Abnormal axis, negative in I and aVL.


Normal duration. Abnormal axis negative in I and aVL.

ST segment

Diffuse ST segment elevation predominantly in the infero-lateral leads.

QT interval



Negatives P, QRS and T waves.


Malpositioning of the electrodes (inversion of the arms). Early repolarisation.


In the differential diagnosis, dextrocardia could be suggested due to the axis of the QRS. However, this diagnosis is invalidated by the normal progression of the R wave in the precordial leads. The morphology of the ST elevation is typical of early repolarisation and is clearly visible in V4 and V5.


Various cardiopathy


Reading level

1 / 3