VAD

VAD may refer to:

Physiology, medicine etc.

 * Vascular dementia (VaD), dementia caused by problems in the supply of blood to the brain
 * Vertebral artery dissection, the development of a flap-like tear in the vertebral artery
 * Ventricular assist device, a mechanical circulatory device used to replace the function of a failing heart
 * Vitamin A deficiency, a lack of vitamin A in humans
 * Vincristine, Adriamycin (doxorubicin), Dexamethasone; a chemotherapy regimen used for multiple myeloma
 * Voluntary assisted dying

Other

 * Voluntary Aid Detachment, a voluntary organisation providing field nursing services in the British Empire
 * VÄD (vodka), an American vodka
 * Voice activity detection, a technique in which the presence or absence of human speech is detected
 * Voice-Activated Dialling, speech recognition to identify the destination for a telephone call in interactive voice response
 * Velocity-Azimuth Display, a technique used to estimate vertical and horizontal components of atmospheric wind vectors from a radar