vasodilatation
C2Technical/Scientific
Definition
Meaning
The widening of blood vessels, which decreases blood pressure and increases blood flow.
In physiology and medicine, the process or state of dilation of blood vessels, particularly arterioles and capillaries, often as a regulatory response or a drug-induced effect.
Linguistics
Semantic Notes
Primarily used in medical, physiological, and pharmacological contexts. Often interchangeable with 'vasodilation', though some technical texts distinguish 'vasodilatation' as the process and 'vasodilation' as the state.
Dialectal Variation
British vs American Usage
Differences
Both 'vasodilatation' and 'vasodilation' are used in both varieties, with 'vasodilation' being more common in contemporary American medical literature. The longer form is sometimes preferred in formal British physiological writing.
Connotations
The term carries no regional connotative differences; it is a precise technical term.
Frequency
Overall low frequency, confined to specialist discourse. 'Vasodilation' is the more frequent variant in general medical communication.
Vocabulary
Collocations
Grammar
Valency Patterns
The drug induces vasodilatation [in + ORGAN].Vasodilatation occurs [in response to + STIMULUS].Vasodilatation is mediated [by + AGENT/MECHANISM].Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Academic
Central to discussions of cardiovascular physiology, thermoregulation, and pharmacology.
Everyday
Virtually never used in everyday conversation.
Technical
Core term in medical reports, research papers, and clinical discussions about blood pressure, shock, drug effects (e.g., nitrates), and inflammatory responses.
Examples
By Part of Speech
verb
British English
- The new medication is designed to vasodilate the coronary arteries.
- These nerves can vasodilate the cutaneous vessels.
American English
- The treatment aims to vasodilate the peripheral vasculature.
- Substance P is known to vasodilate certain arterial beds.
adverb
British English
- The vessels reacted vasodilatatively to the stimulus.
American English
- The drug acts vasodilatorily on the smooth muscle.
adjective
British English
- The vasodilatatory response was measured using plethysmography.
- It has a potent vasodilatation effect.
American English
- The vasodilatory agent was administered intravenously.
- Researchers observed a strong vasodilation response.
Examples
By CEFR Level
- The doctor explained that the medicine works by causing vasodilatation.
- When you are hot, vasodilatation helps cool your body.
- Nitroglycerin relieves angina by inducing coronary vasodilatation, which improves blood flow to the heart muscle.
- The study compared the vasodilatation effects of two different calcium channel blockers.
- Endothelium-derived nitric oxide is a critical mediator of flow-induced vasodilatation in resistance arteries.
- The paradoxical vasodilatation observed in septic shock contributes to refractory hypotension.
Learning
Memory Aids
Mnemonic
Think: 'Vaso' (vessel) + 'dilatation' (making wider). Imagine a vase (vaso) with a widening neck.
Conceptual Metaphor
ROADS/CHANNELS: Blood vessels as pipes or channels that open up to increase flow.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- False friend with 'дилатация' (dilatation) – correct, but the full term is 'вазодилатация' (vasodilatation).
Common Mistakes
- Misspelling as 'vasodialation' or 'vasodilitation'.
- Using it as a verb (e.g., 'The drug vasodilatates'). The correct verb is 'vasodilate'.
Practice
Quiz
Which of the following is a direct physiological consequence of vasodilatation?
FAQ
Frequently Asked Questions
In practical usage, they are synonymous. Some purists argue 'vasodilatation' refers to the active process, and 'vasodilation' to the resulting state, but this distinction is rarely maintained in modern texts.
The opposite process is vasoconstriction, which is the narrowing of blood vessels, increasing blood pressure and reducing flow.
It is central to hypertension management (via vasodilator drugs), septic shock (excessive vasodilatation), angina, heart failure, Raynaud's phenomenon, and inflammatory responses.
Yes. While often therapeutic, excessive or inappropriate vasodilatation (e.g., in anaphylaxis or septic shock) can lead to dangerous drops in blood pressure (hypotension) and inadequate organ perfusion.