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 See also Vad (disambiguation)