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 212

ECG 212


Baseline rhythm

Regular at 60 bpm.P-waves: visible and negative in I, II and aVL.PR interval: normal.QRS: duration 90 ms. Axis -120º. Increased amplitude in the precordial leads.ST segment: depressed from V4 to V6. Elevated in V2.T-waves: negative from V4 to V6.QT interval: normal.


Negatives P waves and QRS complexes.
Negatives P waves and QRS complexes.


Reversal of the arm leads.


This ECG is typical of reversal of the arm leads because the P-wave has – in I and aVL (which is seen in left atrial rhythms) and the QRS also has – in these leads, an axis of -120º. In dextrocardia, the QRS should decrease from V2 to V6 which is not the case here. In right ventricular hypertrophy, there is right axis deviation unlike the axis of the QRS shown here.




Reading level

1 / 3