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 096

ECG 096


Basic rhythm

Sinus rhythm at 85 bpm.

P waves


PR interval

Normal at 200 ms.


Micropotentiels. Q wave in II, III, aVF. R wave in V1.

ST segment

Elevation in II, III, aVF.

QT interval



ST segment elevation.
Q wave.
R wave.


Inferior STEMI (ST elevation myocardial infarction). Micropotentiels.


The ST segment changes and Q waves are signs of an infarction. The small r wave in V1 is due to the posterior extension of the necrosis. The ST segment depression in V1 to V3 is a mirror image of the necrosis. The micropotentiels in the present case are caused by very significant pulmonary emphysema.


Ischemia and myocardial infarction


Reading level

1 / 3