vascular resistance (redirected from Pulmonal vascular resistance)

resistance /re·sis·tance/ (re-zis´tans)

1. opposition, or counteracting force.

2. the natural ability of an organism to resist microorganisms or toxins produced in disease.

3. the opposition to the flow of electrical current between two points of a circuit. Symbol R or .

4. in psychiatry, conscious or unconscious defenses that prevent material in the unconscious from coming into awareness.

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airway resistance  the opposition of the tracheobronchial tree to air flow. Symbols RA, RAW.

androgen resistance  resistance of target organs to the action of androgens; the result is any of a spectrum of defects. In mild to incomplete types the person may have a definite male phenotype but infertility, or may have ambiguous genitalia. In the complete type the person has a female phenotype but XY chromosomes.

drug resistance  the ability of a microorganism to withstand the effects of a drug that are lethal to most members of its species.

electrical resistance  resistance (3).

multidrug resistance , multiple drug resistance in some malignant cell lines, resistance to many structurally unrelated chemotherapy agents in cells that have developed natural resistance to a single cytotoxic compound.

vascular resistance  the opposition to blood flow in a vascular bed.

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vascular resistance,

n the degree to which the blood vessels impede the flow of blood. High resistance causes an increase in blood pressure, which increases the workload of the heart.