Acute respiratory distress syndrome (ARDS) is characterised by rapid onset of widespread inflammation in the lungs.

Autism spectrum disorder (ASD) is a condition that affects social interaction, communication, interests and behaviour.

Source: NHS Inform - ASD

Advanced Trauma Life Support (ATLS) involves the management of a trauma patient.

In the UK, Trauma and Orthopaedics (T&O) is a paired specialty.

Atrioventricular nodal re-entry tachycardia (AVNRT) is the most common type of SVT.

LITFL - AVNRT

AVPU is a responsiveness scale: Alert, responds to Voice, responds to Pain, Unresponsive

Atrioventricular re-entrant tachycardia (AVRT), also termed atrioventricular reciprocating tachycardia, is a type of SVT most commonly associated with Wolff–Parkinson–White syndrome.

LITFL - Pre-excitation syndromes

Abdominal X-ray (AXR, more accurately abdominal radiograph) may be used to confirm diagnoses such as bowel obstruction, toxic megacolon and renal colic (using a KUB AXR, Kidneys-Ureters-Bladder).

Radiopaedia - AXR