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 172

ECG 172


Baseline rhythm

Regular sinus at 60 bpm. In the precordial leads P-waves can no longer be discerned and the interval between 2 QRS complexes varies.P-waves: bifid in II and aVF.PR interval: normal.QRS: Axis and duration normal.ST segment: normal.T-waves: normal.QT interval: normal.


Absence of P waves. RR interval variable.
P on T initiating atrial fibrillation.


Focal atrial fibrillation.


In the precordial leads, we can no longer see P-waves and the interval between the QRS complexes varies. This corresponds to the onset of a run of focal atrial fibrillation.




Reading level

2 / 3