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 037

ECG 037


Basic rhythm

Regular tachycardia at 100 bpm.

P waves

Normal. Electrical activity (spikes) at 32/min dissociated from the QRS complexes and from the P waves.

PQ interval

Normal at 200 ms.


Non-specific intraventricular conduction disturbance. Q waves in II,III and aVF.

T waves

Prominant, enlarged and ST segment interval almost disappears.


Q waves in the inferior leads.
Isolated spike.
Sinus tachycardia.
Prominant T waves.


Sinus tachycardia. Old inferior myocardial infarction. Pacemaker dysfunction. Hyperkalaemia.


Hyperkalaemia can be suspected due to the morphology of the T waves in the precordial leads. The pacemaker discharges randomly at 32/min because the battery is at the end of its life. A detection and stimulation defect is present. The enlargement of the QRS complexes is due to the non-specific intraventricular conduction disturbances.


Prolongation of the QT interval


Reading level

2 / 3