OBJECTIVE Obstruction of the venous pathways after Mustard repair for transposition of the great arteries is associated with an increased risk of arrhythmia and sudden death. The purpose of this study was to assess the effectiveness of the largest (tracheal 22 x 40 mm) Wallstents in treating baffle obstructions. DESIGN Retrospective analysis of patients with stented venous pathways. SUBJECT...

Buoyancy driven heat transfer of Cu-water nanofluid in a differentially heated square cavity with an inner adiabatic square baffle at different positions is studied numerically. The left and right walls of the cavity are at temperatures of Th and Tc, respectively that Th > Tc, while the horizontal walls are insulated. The governing equations are discretized using the finite volume method while ...

Although excellent results have been reported on echocardiographic detection of postoperative sequelae after the Mustard procedure (1-3), baffle obstruction cannot definitely be ruled out in certain cases (3). This may be due to a combination of poor echo windows and the complex three-dimensional relationship of the intraatrial structures. Because it seems imperative to rule out baffle patholog...

Forty-nine patients with transposition of the great arteries who underwent a Mustard atrial baffle repair between 1964 and 1971 were assessed late postoperatively. There have been five late deaths: two related to baffle obstruction, two from noncardiac causes, and one sudden and unexpected. Hemodynamic data were available in 42 patients and autopsy in four. Obstruction of the lower venous chann...

An antireflection overcoat for opaque baffle coatings in the FIRlsubmillimeter region has been made from a simple Teflon spray-on lubJricant. The Teflon overcoat reduced the specular reflectance of four different c,paque coatings by nearly a factor of two. Analysis, based on the interfElrence term of a reflecting-layer model, indicates that in the submillimeter region the reduced reflectance de...

background and objectives: pomegranate juice (pj) contains large particles that stick to evaporator walls causing off flavors in the concentrate due to burning. microfiltration is used to clarify pj. fouling is a limiting phenomenon that can prevent the industrialization of membrane clarification. changes in the geometry of the membrane module such as using baffles are useful to decrease this p...

Bu çalışmada, üst duvarında dik bölmeler bulunan, alt duvarı trapez şeklinde dalgalandırılmış bir kanalda farklı bölme yüksekliğinin akış ve ısı transferine etkileri nanoakışkan taban akışkan akışı için sayısal olarak incelenmiştir. Nanoakışkan TiO2 nanopartiküllerin su içerisinde süspansiyonu kullanılmış nanopartikül hacim oranı, φ=%1 sabit tutulmuştur. Sayısal çalışma, Hesaplamalı Akışkanlar ...

Building acoustic beamformers is a problem whose solution is hindered by the wide-band nature of audible sound. In order to achieve a consistent directional response over a wide range of frequencies, a conventional acoustic beamformer needs a high number of discrete loudspeakers and be large enough to achieve a desired low-frequency performance. The acoustic beamformer design described in this ...

the effect of γ-al2o3 nanoparticles on heat transfer rate, baffle spacing and pressure drop in the shell side of small shell and tube heat exchangers was investigated numerically under turbulent regime. γ-al2o3-water nanofluids and pure water were used in the shell side and the tube side of heat exchangers, respectively. since the properties of γ-al2o3-water nanofluids were variable, they were ...