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 155

ECG 155


Baseline rhythm

Regular at 38 bpm.P-waves: invisible. Baseline oscillation.PR interval: non measurable.QRS: broadened (180 ms); rsR’ in V1, V2. Normal axis.ST segment: isoelectric.T-waves: negative in the precordial leads.QT interval: 480 ms (normal if corrected).


similar RR interval.
Typical aspect of right bundle branch block (rSR').


Atrial fibrillation with complete A-V block.


The QRS complexes are regular with the typical appearance of RBBB. We see the baseline oscillations which correspond to that of atrial fibrillation. If the QRS complexes are regular, it is because there is co-existent atrial fibrillation with complete A-V block.


Conduction abnormalities


Reading level

2 / 3