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 151

ECG 151


Baseline rhythm

Regular sinus rhythm at 80 bpm.P-waves: normal, not always visible.PR interval: normal.QRS: normal when it is preceded by a p-wave with an axis of -45 degrees. Broad complex when there is no preceding p-wave. The fourth QRS complex is only partially broad. RBBB morphology in V1 for the broad complexes.ST segment: oblique descending in III and depressed in V2 and V3. Elevation in aVL.T-waves: normal.QT interval: normal.


ST segment elevation.
Wide QRS complexes with fusion beats and A-V dissociation.


Accelerated Idioventricular Rhythm following a postero-lateral infarct.


The baseline rhythm is sinus rhythm. It is interrupted by a broad complex rhythm withRBBB morphology. These QRS complexes are not preceded by a p-wave and the 4th complex is only moderately broadened because it is a fusion beat. The broad complex rhythm is dissociated from the p-waves. The criteria necessary to make a diagnosis are all present. The ST elevation seen in I and aVL is characteristic of a postero-lateral STEMI.


Ischemia and myocardial infarction


Reading level

3 / 3