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
 
See also
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