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 159

ECG 159


Baseline rhythm

Regular at 75 bpm.P-waves: visible and negative in II, III and aVF and from V4 to V6.PR interval: normal.QRS: normal duration and axis.ST segment: normal.T-waves: normal.QT interval: normal.


Negatives P waves.


Ectopic right atrial rhythm.


The P’-waves preceding the QRS complexes are negative in II, III and aVF which corresponds to an ectopic right atrial rhythm known as coronary sinus. This is a benign rhythm in the vast majority of cases.


Ectopic rhythm


Reading level

1 / 3