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 119

ECG 119


Basic rhythm

Sinus rhythm, regular at 105 bpm.

P waves

Biphasic with a negative portion predominant in V1.

PR interval



Prolonged (120 ms).

Q waves in II, III and aVF.

ST segment

Elevated in II, III, aVF; oblique and descending in the right precordial leads.

T waves

Flattened or negative in all parts of the trace.

QT interval



Q wave.
ST segment elevation.


STEMI (ST segment elevation myocardial infarction) in the inferior region with parietal aneurysm.


The ST segment elevation (which, in the inferior leads, accompanies the Q waves of an inferior infarction) suggests a parietal aneurysm, since the trace was recorded 1 month after the acute coronary syndrome. The widening of the QRS complex in the leads where the Q wave is present corresponds to a conduction disturbance in the perilesional region.


Ischemia and myocardial infarction


Reading level

1 / 3