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 062

ECG 062


Basic rhythm

Sinus rhythm, regular at 83 bpm.

P waves

Increased amplitude, pointed and symmetric pattern in the inferior leads.

PR interval

Increased (220 ms in V1).


Right axis deviation (+120°). Q wave in V1, normal duration.

ST segment


T waves

Negative from V1 to V4.

QT interval



Rigth axis deviation.
Right atrial enlargement.
Prolonged PR interval.


Right atrial and ventricular hypertrophy, first degree A-V block.


This patient had VSD (ventricular septal defect), which had caused right hypertrophy and strain, shown by repolarisation disturbances from V1 to V4, as well as right atrial hypertrophy (increased P wave amplitude in the inferior leads).

A predominant R wave in V1 and predominant S wave in V6 are the missing from the criteria for right ventricular hypertrophy.




Reading level

1 / 3