It has been stated that congenital cartilage rings in the esophagus do not respond to dilation and should be resected. The authors report on 3 infants with congenital esophageal stenoses who were treated successfully with hydrostatic balloon dilation. Based on the appearance during dilation the authors believe that these stenoses were cartilage rings. The technique is described in detail. Ballo...

The purpose of this study was to investigate the receptor subtypes that mediate the dilation of rat intracerebral arterioles elicited by adenosine. Penetrating arterioles were isolated from the rat brain, cannulated with the use of a micropipette system, and luminally pressurized to 60 mmHg. Both adenosine and the A2A receptor-selective agonist CGS-21680 induced dose-dependent vasodilation (-lo...

OBJECTIVES To analyze immediate and long-term results of balloon dilation for aortic coarctation in a three-center experience in Mexico, and to determine factors associated with increased risk. BACKGROUND Results demonstrated that the procedure is effective and safe, however its use in some groups is still controversial, specially in neonates and infants. METHODS In a ten-year period, 333 p...

Treatment options for eosinophilic esophagitis (EoE) include drugs, diets and esophageal dilation. Esophageal dilation can be performed using either through-the-scope balloons or wire-guided bougies. Dilation can lead to long-lasting symptom improvement in EoE patients presenting with esophageal strictures. Esophageal strictures are most often diagnosed when the 8- to 9-mm outer diameter adult ...

A traditional wavelet is a special case of a vector in a separable Hilbert space that generates a basis under the action of a system of unitary operators defined in terms of translation and dilation operations. A Coxeter/fractal-surface wavelet is obtained by defining fractal surfaces on foldable figures, which tesselate the embedding space by reflections in their bounding hyperplanes instead o...

Hypercubes are known to be able to simulate other structures such as grids and binary trees. It has been shown that an arbitrary binary tree can be embedded into a hypercube with constant expansion and constant dilation. This paper presents a simple linear-time heuristic which embeds an arbitrary binary tree into a hypercube with expansion 1 and average dilation no more than 2. We also give som...

Depressed individuals frequently display disruptions in selective attention, but the time course and specificity of these difficulties are not well-understood. To better understand the nature of attentional disruptions in depression, 28 healthy adults and 23 unmedicated depressed adults completed a Stroop color-naming task using a long inter-stimulus interval and pupil dilation was recorded as ...

The pupil dilation reflex is mediated by inhibition of the parasympathetic Edinger-Westphal oculomotor complex and sympathetic activity. It has long been documented that emotional and sensory events elicit a pupillary reflex dilation. Is the pupil response a reliable marker of a visual detection event? In two experiments where viewers were asked to report the presence of a visual target during ...

The effect of memory load on the cognitive pupillary response among 16 young adults and 16 older adults was investigated. Mean pupil dilation and reaction time were measured during a Sternberg memory-search task, which involved six levels of memory load. A classic interaction pattern was obtained in which the reaction times of the elderly participants increased more as a function of memory load...