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Glossary

Terms

V


V-Q (ventilation-perfusion) scan
A nuclear imaging study that looks at how well areas of the lungs that have air delivery (ventilation) are receiving blood flow (perfusion); usually used to diagnosed pulmonary emboli that cause decreased perfusion
Vasodilation
Widening or dilation of blood vessels.
Vasodilator
A chemical (natural or synthetic) that dilates blood vessels
Ventricle
The two larger chambers (one on each side) of the heart; the right ventricle pumps blood to the lungs for oxygenation and the left ventricle pumps freshly oxygenated blood to the rest of the body.
Vitamin K
A natural vitamin that is found in green leafy vegetables; it counteracts the blood thinning effects of warfarin®.