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 216

ECG 216


Baseline rhythm

Regular at 40 bpm.P-waves: increased amplitude in II, III and aVF..PR interval: not applicable.QRS: narrow, axis +75°. Increased amplitude in II, III and aVF.

ST segment

Negative in precordial leads.T-waves: negatives in V3-V6.QT interval: normal.


Non conducted P waves.
A-V dissociation.


Complete A-V block. Right atrial enlargement.


The atrioventricular dissociation is typical for a complete A-V block. The increased amplitude of P waves in II, III and aVF is a sign of right atrial enlargement. The association of this atrial enlargement and the complete A-V block is seen in the corrected transposition of the great vessels as in this case.


Conduction abnormalities


Reading level

2 / 3