reactive hyperemia


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hyperemia

 [hi″per-e´me-ah]
an excess of blood in a part; called also engorgement. adj., adj hypere´mic.
active hyperemia (arterial hyperemia) that due to local or general relaxation of arterioles.
leptomeningeal hyperemia congestion of the pia-arachnoid.
passive hyperemia that due to obstruction of flow of blood from the area.
reactive hyperemia that due to increase in blood flow after its temporary interruption.
venous hyperemia passive hyperemia.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

re·ac·tive hy·per·e·mi·a

hyperemia following the arrest and subsequent restoration of the blood supply to a part.
Farlex Partner Medical Dictionary © Farlex 2012

re·ac·tive hy·per·e·mi·a

(rē-ak'tiv hī'pĕr-ē'mē-ă)
Excess blood following the arrest and subsequent restoration of the blood supply to a part.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Overall Males n = 874 n = 213 Ln-RHI 0.67 [+ or -] 0.32 0.63 [+ or -] 0.31 Ln-RHI < 0.51 293 (33.5) 35.2 Ln-RHI < 0.44 (1Q) 223 (25.5) 25.6 Females p value n = 661 Ln-RHI 0.68 [+ or -] 0.33 0.055 Ln-RHI < 0.51 33 ns Ln-RHI < 0.44 (1Q) 25.4 ns Values are expressed as median [+ or -] 1SD; Ln-RHI: logarithmic reactive hyperemia index; 1Q: first quartile.
Post-occlusive reactive hyperemia (PORH), an index of microvascular function was calculated as (peak cutaneous blood flow--baseline cutaneous blood flow)/baseline cutaneous blood flow x 100 (12).
Although the exact mechanism is unknown, reactive hyperemia is thought to occur due to the build-up of vasodilator metabolites such as endothelium-derived nitric oxide following vascular occlusion, which decreases vascular resistance leading to increased blood flow to the ischemic tissue [47, 48].
Microvascular vasodilator response indices, improving the reproducibility of the method [16] were calculated: delta reactive hyperemia ([DELTA]RH) as PUrh-PUb; percent change of reactive hyperemia (% RH) as ([DELTA]RH/PUb)x100; the velocity of PORH microvascular response (Vrh) calculated through dividing of delta reactive hyperemia by the time to peak blood flow ([DELTA]RH/t).
To explore the relationship between CHD and vascular endothelial function, CHD outpatients were recruited from our hospital and received the non-invasive detection of endothelial function (reactive hyperemia index, RHI) with Endo-PAT2000 Diagnostic System.
Major finding: Rosuvastatin failed to improve pulmonary function overall, but significantly improved peripheral vasodilator function in patients with elevated hsCRP levels at baseline, indicated by a final reactive hyperemia index of 2.8 vs.
In the Framingham Heart Study offspring cohort increased aortic stiffness was associated with higher forearm vascular resistance at baseline and during reactive hyperemia, and with blunted flow reserve during hyperemia (39).
A transient increase in skin blood flow after ischemia is regulated by a protective mechanism called reactive hyperemia [4850,56-57].
The diameter of brachial artery was measured by 10 MHz transducer in longitudinal section on 2-1,5 cm above the elbow bend before and after tests with reactive hyperemia through 30-90 seconds.
HEPA filtration was linked to a 9.4% increase in the reactive hyperemia index (RHI), a marker of endothelial function, and a 32.6% decrease in C-reactive protein, a marker of inflammation.
After analyzing their data, the researchers found portable HEPA filters reduced the average concentrations of fine particulates inside homes by 60 pc and woodsmoke by 75 pc, and their use was associated with improved endothelial function (a 9.4 pc increase in reactive hyperemia index) and decreased inflammation (a 32.6 pc decrease in C-reactive protein).
This blood flow occlusion produces an ischemia-induced reactive hyperemia and, upon occlusion release, an increase in shear stress.

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