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English word vasovagal comes from English vaso-, English vagal ((anatomy) of or relating to the vagus nerve.)
vaso- (English)
(medicine, pathology) Pertaining to blood vessels or the vascular system.
vagal (English)
(anatomy) of or relating to the vagus nerve.
vasovagal (English)
Pertaining to the vagus nerve as well as the vascular system; often describing an attack etc. characterised by slowing of the pulse and a fall in blood pressure.