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 186

ECG 186


Baseline rhythm

Regular at 60 bpm.P-waves: non-visible.PR interval: non-measurable.QRS : normal.ST segment : normal.

T wave

Normal. QT interval : normal.


U wave.
No P wave before and after the QRS complex.


Nodal rhythm. U-waves clearly seen.


The P-waves are absent and cannot be seen either just before or just after the QRS complex. This is therefore a nodal rhythm with P-waves buried in the QRS complex. A U-wave is clearly seen after the T-wave.


Ectopic rhythm


Reading level

1 / 3