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 167

ECG 167


Baseline rhythm

Regular at 101 bpm.P-waves: visible with an increased amplitude in II, III and markedly negative in V1.PR interval: normal.QRS: broadened (120 ms). Axis +70°.ST segment: depressed from V1 to V4.T-waves: negative from V1 to V4.QT interval: normal.


Increased amplitude of P waves.
Markedly negative of the terminal portion of the T wave.
Almost vertical axis of the QRS complex.


Bi-atrial hypertrophy, incomplete RBBB and probable right ventricular hypertrophy.


The morphology of the P-waves in II, III is typically that of right atrial hypertrophy with amplitude of the P-waves > 2.5 mm. In V1, the terminal negativity of the P-wave is due to left atrial hypertrophy. The axis of the QRS complex is almost vertical and its morphology in V1 is that of RBBB. This recording is that of mitral stenosis with bi-atrial dilatation and right ventricular dilatation revealing itself by the incomplete RBBB and the almost vertical axis of the QRS complex.




Reading level

1 / 3