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 049

ECG 049


Basic rhythm

Sinus rhythm, regular at 60 bpm.

P waves


PR interval

Prolonged (260 ms).


Enlarged (180 ms), very atypical morphology, right bundle branch block type; micropotentiels in the peripheral leads. Right axis deviation.

ST segment


T waves

Flattened or inverted in most leads.

QT interval

Prolonged (520 ms).


Atypical Right Bundle Branch Block.
Prolonged PR interval.
Rigth axis deviation.


Ebstein's disease.


Ebstein's disease is usually associated with micropotentiels (only present in the peripheral leads on this trace), a prolonged PR interval, right atrial hypertrophy and an rSR pattern in V1-V2. On the present trace only the signs of dilation of the right atrium are missing.


Various cardiopathy


Reading level

3 / 3