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 200

ECG 200


Baseline rhythm

Tachycardia at 102 bpm.P-waves: negative in II, III and aVF.PR interval: normal.QRS: normal.ST segment : normal.T-waves : negative from V1 to V4.QT interval: normal.


Negatives P' waves in II, III and aVF. Interval RP' > P'R.


Atrial tachycardia originating from the region of the coronary sinus.


This is a narrow complex tachycardia with P’-waves which are clearly visible but which depolarize the atria in a caudo-cranial fashion. The differential diagnosis, owing to the interval RP’>P’R, is between an trial tachycardia, a permanent junctional re-entrant tachycardia (PJRT) and a nodal tachycardia utilizing the fast pathway as the anterograde limb and the slow pathway as the retrograde limb. It is often the history which helps clinch the diagnosis. Atrial tachycardia generally affects adults, sometimes the elderly. PJRT is incessant in children and the atypical form of nodal tachycardia has a predilection for young adults with identifiable crises.




Reading level

2 / 3