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 209

ECG 209


Baseline rhythm

Regular sinus at 80 bpm.P-waves: normal.PR interval: 200 ms.QRS: normal. Broad QRS extrasystoles.ST segment: depressed from V2 to V4.T-waves: negative in II, III and aVF. Peaked in V2 and V3.QT interval: normal.


A-V dissociation. Salvos of wide QRS complex tachycardia.
Right bundle branch block morphology with r/s ration < 1 in V6.


Ventricular extrasystoles with salvos of non-sustained ventricular tachycardia.


The morphology of the QRS in the precordial leads is typical of ventricular complexes. In the peripheral leads, the salvo of tachycardia is of the broad complex type with a left axis. The Q-wave in aVR is compatible with a ventricular complex. The 2nd and 3rd complex of this salvo are followed by a P-wave which is retrograde. The first complex of this salvo is not followed by a P-wave because at this instant, there is a dissociation which disappears as soon as the retrograde conduction arises. The last visible complex in these peripheral leads is also broader and followed by a dissociated sinus P-wave.




Reading level

2 / 3