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 210

ECG 210


Baseline rhythm

Regular at 35 bpm.P-waves: non-visible.PR interval: non-measurable.QRS : broadened (120 ms). Axis -150º.ST segment: depressed in II, III and from V4 to V6. Elevated in V2.T-waves: peaked in I, II and from V2 to V6.QT interval: prolonged.


No P waves.
Broad QRS complex, prolonged QT interval. Peaked T wave.


Idioventricular rhythm. Hyperkalemia.


This ECG is typical of hyperkalemia with absence of P-waves and very broad QRS complexes. The T-waves are very peaked which is equally characteristic of hyperkalemia. We see the beginnings of fusion between the QRS and the T-waves which at the next stage initiates an agonal rhythm represented by an oscillation of the baseline. In the case presented, the potassium was 8.3 mmol/l.


Electrolytes disorder and intoxication


Reading level

1 / 3