I AHPR = acute hypoxic pressor response T he pulmonary circulation responds to acute hypoxia with increases in pulmonary artery pressure and vascular resistance. This acute hypoxic pressor response (AHPR) is a unique physiologic feature distinguishing the pulmonary from the systemic circulation which dilates in response to hypoxia.’ Since Von Euler and Liljestrand described the phenomenon of ac...

various studies suggest that selective serotonin reuptake inhibitors (ssris) may be useful in treating pathological skin picking (psp). this study sought to assess effectiveness of citalopram in comparison with placebo in treating psp. forty five individuals with psp were recruited in a four-week, randomized clinical trial of citalopram (20 mg/day) in comparison with placebo. study measures ass...

malignancy and tumor in ent are less common but more important, also they have not any certain sign until they progress thus it will be so important that we consider some abnormal common signs when we are examine patients until do not miss them, this study was conducted to establish the various clinical modes of presentation of pharyngeal neoplasm and their correlation with final histopathologi...

Reflex vasoconstriction is attenuated in aged skin due to a functional loss of adrenergic vasoconstriction. Bioavailability of tetrahydrobiopterin (BH4), an essential cofactor for catecholamine synthesis, is reduced with aging. Locally administered BH4 increases vasoconstriction through adrenergic mechanisms in aged human skin. We hypothesized that oral sapropterin (Kuvan, a pharmaceutical BH4)...

background and aims: infectious bronchitis (ib), caused by infectious bronchitis virus (ibv), is an acute and highly contagious disease in chickens. ibv is considered mainly as a respiratory infection, other clinical manifestations, including renal, enteric and reproductive signs can be observed. since there has been no study on evaluation of changes in biochemical parameters during ib infectio...

background: the internet addiction, also described as pathological internet use (piu), is conceptualized by an individual's in­ability to control his or her use of the internet, which eventually causes marked distress and/or functional impairment. the aim of the present study was to investigate the prevalence of the piu among adolescence, in relation to different internet ac­tivities, and to ex...

1. To test whether almitrine might improve the arterial partial pressure of O2 in patients with chronic obstructive airways disease by improvement of ventilation-perfusion matching, we looked at the interaction between hypoxic and almitrine-induced vasoconstriction in isolated rat lungs perfused with blood at constant flow. Increases in pressure represented increases in resistance. 2. Almitrine...

Skeletal muscle vascular resistance during physical exertion is higher with old age. The purpose of this study was to determine whether 1) aging enhances angiotensin II (ANG II)-induced vasoconstriction; 2) the proinflammatory cytokine tumor necrosis factor (TNF)-α contributes to alterations in ANG II-mediated vasoconstriction with aging; 3) exercise training attenuates putative age-associated ...