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 010

ECG 010

Description

Continous recording.

Left side of the trace (peripheral leads)

Basic rhythm: tachycardia irregularly irregular between 105 and 125 bpm with a sudden stop after the seventh QRS complex (atrial fibrillation).

P waves

Absent.

QRS

Normal axis and morphology.

ST segment

Isoelectric.

T waves

Non-specific changes.

QT interval

Normal.

Right side of the trace (precordial leads)

Basic rhythm: sinus bradycardia, appearing to be regular at 33 bpm.

P waves

Variable morphology.

PR interval

Normal.

QRS

Normal morphology.

ST segment

Slight depression.

T waves

Inverted from V2 to V6.

QT interval

Normal.

Zones

Multiple P waves morphology. Bradycardia.
Irregularly irregular tachycardia typical for atrial fibrillation.

Diagnostic

Tachycardia-bradycardia syndrome.

Comments

On the left side of the trace, atrial fibrillation is present. On the right side, P waves with variable morphologies, and therefore multifocal P waves, can be clearly identifed. This trace is a typical example of tachycardia-bradycardia syndrome which is one of the conditions caused by sinus node disease. In the absence of ischaemia, any type of cardiopathy (hypertensive cardiopathy being the most common) or drug treatment, repolarisation disturbances are to be considered as "post-tachycardic".

Category

Conduction abnormalities

Keywords

Reading level

1 / 3