Intermediate
Technical
IVT
vasodilator
Pronunciation: VAY-so-dy-lay-tor
An agent that causes blood vessel relaxation and increased luminal diameter.
Full Definition
A pharmacological agent or physiological mechanism that induces smooth muscle relaxation in blood vessel walls, leading to increased vessel diameter and enhanced blood flow. In angiological practice, vasodilators are used diagnostically to assess vessel reactivity and therapeutically to improve perfusion. Common examples include nitrates, calcium channel blockers, and adenosine, each working through different molecular pathways to achieve vessel relaxation.
Usage
Usage note: Can be used as both noun and adjective (vasodilator drug, vasodilator effect).
In Context
- "Intracoronary vasodilator administration eliminated catheter-induced spasm." — Catheter laboratory report
- "The vasodilator response test confirmed preserved endothelial function." — Vascular function study
Also known as
vessel relaxant
arterial dilator
Contrasted with
vasoconstrictor
vessel contractor
Don't confuse with
vasopressor
vasoconstrictor