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 161

ECG 161


Baseline rhythm

Regular at 75 bm.P-waves: absent.PR interval: non measurable.QRS : broadened (130 ms), rSR’ in V1.ST segment: negative from V1 to V3.T-waves: normal.QT interval: normal.


rSR' typical for right bundle branch block.
Absence of P waves.


Nodal rhythm with RBBB.


We don’t see the p-waves which signifies that the rhythm is nodal. The rSR’ in V1 corresponds to RBBB. The alternative diagnosis to nodal rhythm with RBBB is that of a rhythm originating in the left branch of the His Bundle, which explains both the absence of a p-wave and the RBBB.


Conduction abnormalities


Reading level

1 / 3