refractoriness


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refractoriness

 [re-frak´tah-re″nes]
the state of being refractory.
postrepolarization refractoriness refractoriness to stimuli that exists even after a fiber has completely repolarized; see also absolute refractory period.
References in periodicals archive ?
Thyroxine treatment induces changes in hypothalamic gonadotrophin-releasing hormone characteristic of photo refractoriness in starlings (Sturnus vulgaris).
Although transmission by males is generally lower than that by females and mutations blocking male but not female transmission are well known [6], we are unaware of other work demonstrating differences in sex-specific refractoriness to acquisition of DMelSV.
The exact mechanism of tachycardia was determined by electrophysiological study including induction and termination of tachycardia by atrial or ventricular extra-stimuli, presence of dual AV nodal physiology, parahisian pacing, retrograde conduction properties during ventricular pacing and advancement of the atrial electrogram after ventricular extra-stimulus delivered during His refractoriness. Successful ablation was defined as the non-reinducibility of the native tachycardia and the loss of the delta wave in manifest WPW syndrome.
Thrombocytopenia produced by antibody-mediated destruction must also be considered a mechanism that may underlie refractoriness to platelet transfusions.
It can be seen that processing of refractory gold ores can yield low rates, so they require implementation of extra stages, such as roasting, in order to eliminate the compounds that cause the refractoriness (e.g.
Histological observation of the testes showed uniform diameter of seminiferous tubules with a thick basal blade and the absence of spermatozoa in the lumen of seminiferous tubules marking thus, gonads regression and a refractoriness period.
Effective prophylaxis against platelet refractoriness in multitransfused patients by use of leukocyte free blood components.
Possible homologies between photo refractoriness in sheep and birds: the effect of thyroidectomy on the length of the ewe's breeding season.
In the early summer the spermatogenesis is over and Podarcis enters in the status considered a condition of physiological hypophysectomy named refractoriness during which the lizards are unresponsive to endogenous or exogenous hormones [32].
The fast-growing nature of this type of cancer and its refractoriness to radioiodine treatment due to tumors not concentrating iodine limit the efficacy of therapeutic interventions [2].
Azpiroz et al., "Early changes in interferon signaling define natural killer cell response and refractoriness to interferon-based therapy of hepatitis C patients," Hepatology, vol.