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 196

ECG 196


Baseline rhythm

Regular at 75 bpm.P-waves: visible, normal.QRS: normal.ST segment: normal.T-waves : negative in V1 and V2.QT interval: duration 460 ms.


Prolonged QT interval. QTc = 520 ms.


Congenital long QT syndrome.


Looking carefully at the tracing, we note that the QT interval is prolonged. The rest of the ECG is otherwise normal. The syncopal episodes of this young patient are without a doubt related to torsades de pointes. This tracing demonstrates well that we often neglect to measure the QT.


Prolongation of the QT interval


Reading level

1 / 3