Core principles

Wiggers diagram showing aortic, atrial, and ventricular pressures; ventricular volume; electrocardiogram; and phonocardiogram across cardiac systole and diastole.

Cardiac Physiology in CHDs

Color-coded cardiac axis diagram showing normal QRS axis, left axis deviation, right axis deviation, and extreme axis deviation, with ECG leads and degree markings.

ECG interpretation

Foetal vs Adult circulation

Popular

Illustration of the thyroid gland’s two lobes connected by an isthmus in the front of the neck, overlying the trachea below the larynx.
Thyroid

Hyperthyroidism

by Ismah Aslam and Rabbi Swaby

Diagram showing five types of peri-orbital cellulitis, with blue circles representing the globe and red or yellow areas representing cellulitis or pus in pre- and post-septal locations.
Nose

Peri-orbital cellulitis

by Mr Abdul-Karim Nassimizadeh ENT consultant and Dr Bindy Sahota

Injuries

Burns assessment

by Adam Bonfield