نتایج جستجو برای: 2525
تعداد نتایج: 257 فیلتر نتایج به سال:
Abstract Funding Acknowledgements Type of funding sources: None. Background Pulmonary vein isolation (PVI) using cryoballoon (CB) ablation has comparable efficacy and safety compared to radiofrequency (RFA) for first procedure treatment symptomatic atrial fibrillation (AF). Redo procedures are usually done with RFA, allowing selective pulmonary re-isolation as well formation additional lesion s...
objectives to evaluate predictive value of vessel specific coronary artery calcium (cac) score in predicting obstructive coronary artery disease. patients and methods in this diagnostic test study we evaluated patients with coronary computed tomography angiography (ccta) and cac score which had been referred to two referral radiology center in tehran, iran and finally we selected 2525 patients ...
Antihypertensive Treatment and Left Ventricular Mass Reduction: The Importance of Choosing the Comparator To the Editor: The meta-analysis by Fagard et al1 on the effects of various antihypertensive drug classes on left ventricular mass is based on the pairwise comparisons of the original studies and avoids the problems with previous meta-analyses, which considered each treatment arm of the dif...
protein that binds to a repeated EP motif in the intracellular region of LAG-3, may participate in the down-regulation of the CD3/TCR activation pathway. Eur. J. Immunol. 31, 2885–2891 14 Huard, B. et al. (1995) CD4/major histocompatibility complex class II interaction analyzed with CD4and lymphocyte activation gene-3 (LAG-3)-Ig fusion proteins. Eur. J. Immunol. 25, 2718–2721 15 Barten, R. et a...
Endogenous patient sorting across hospitals can confound performance comparisons. This paper provides a new lens to compare hospital performance for emergency patients: plausibly exogenous variation in ambulance-company assignment. Ambulances are effectively randomly assigned to patients in the same area based on rotational dispatch mechanisms. Using Medicare data from 2002-2008, we show that a...
This paper addresses the issue of robust VDSL transmission in the presence of bridged taps in the local loop. The impact of bridged taps on transmission performance is described and evaluated for various frequency-division duplexing plans. It is shown that using only 4 bands will under several realistic circumstances result in very poor performance. The conclusion is that a robust duplexing pla...
BACKGROUND Coronary artery calcification which is determined quantitatively by coronary calcium scoring has been known as a sign of coronary stenosis and thus future cardiac events; hence it has been noticed on spotlight of researchers in recent years. Developing different method for early and optimal detection of coronary artery disease (CAD) is really essential as CAD are the first cause of d...
BACKGROUND Effective, low-cost approaches are needed to enhance dietary behavior change. While both video and tailoring technology have been effective interventions to improve diet, these approaches have never been combined to study the effectiveness of tailored videos. The purpose of this paper is to discuss the results of Good For You!, a randomized trial that tested the efficacy of innovativ...
This document reports on performance of a splitterless "V/ADSL" system that uses DMT with 4.3125 kHz wide tones over the band from DC to 5 MHz. Asymmetric 26/3.2 Mbps V/ADSL service reaches over 3000 feet, while symmetric service at 6.5 Mbps and 3.2 Mbps reaches are 3000 to 6000 feet for the conventional (or digitally duplexed) DMT. These ranges are maintained even in the presence of bridged-ta...
We describe the characteristics of low-cost ultra-high-power light emitting diodes (LEDs) for use in optical imaging experiments. We use the LEDs in experiments with bullfrog cardiac tissue and find that the signal-to-noise ratio is comparable to other commonly used illumination sources. Contact Information: Duke University, Department of Physics, Box 90305, Durham, NC, 27708 Tel: (919) 660-251...
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