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 082

ECG 082


Basic rhythm

Sinus rhythm at 60 bpm.

P waves

Increased amplitude in V1.

PR interval



Normal duration, right axis at +95°.

T waves

Negative from V1 to V6 and in I, II, aVL and aVF.

QT interval



Rigth axis deviation.
Profound S wave.
Negative T waves.


Pulmonary hypertension with right axis deviation.


In this case the pulmonary hypertension is significant (70 mmHg). This trace illustrates clearly that even with such severe hypertension the changes to the ECG can be minor, since only the QRS axis deviation and negative T waves from V1 to V6 (a sign of right ventricular strain) cause us to suspect the diagnosis of right ventricular strain with repercussions on the right atrium.


Various cardiopathy


Reading level

1 / 3