OBJECTIVES More elderly patients (>80 years of age) are being referred for aortic valve replacement (AVR) with or without CABG. Current risk stratification models may not accurately predict the preoperative risk in these patients. We sought to determine which perioperative variables were relevant in determining short-term (30-day to in-hospital) outcomes in our intuition's series of consecutive...

BACKGROUND The optimal management of low-gradient "severe" aortic stenosis (mean gradient <40 mm Hg, indexed aortic valve area ≤0.6 cm2/m2) with preserved left ventricular ejection fraction remains controversial because gradients may be similar after aortic valve replacement (AVR). We compared outcomes of low-gradient severe aortic stenosis with AVR or medical therapy. METHODS AND RESULTS Com...

BACKGROUND AND AIM OF THE STUDY Between January 1, 1997 and December 31, 2001, a total of 342 patients underwent aortic valve replacement (AVR) or mitral valve replacement (MVR) with the ATS Medical prosthesis. The initial three-year phase of this study took place under a United States Food and Drug Administration-approved investigational device exemption study. The study aim was to determine t...

Plant resistance proteins (R proteins) recognize corresponding pathogen avirulence (Avr) proteins either indirectly through detection of changes in their host protein targets or through direct R-Avr protein interaction. Although indirect recognition imposes selection against Avr effector function, pathogen effector molecules recognized through direct interaction may overcome resistance through ...

BACKGROUND Left ventricle (LV) in patients with aortic stenosis (AS) faces a double hemodynamic load incorporating both valvular stenosis and reduced systemic arterial compliance (SAC). This study aimed to evaluate the impact of global LV afterload on LV hypertrophy (LVH) before and after aortic valve replacement (AVR). METHODS The study cohort included 453 patients (247 males; mean age, 64 ±...

The state-estimation and optimal control of multigeneration systems are challenging for wide-area having numerous distributed automatic voltage regulators (AVR). This paper proposes a modified Q-learning method algorithm that aim to improve the convergence approach enhance dynamic response stability terminal multiple generators in experimental Western System Coordinating Council (WSCC) large-sc...

Received Nov 1, 2011 Revised Jan 18, 2012 Accepted Jan 28, 2012 In this paper, we have proposed a technique by which customized sound can be generated using 8 bit AVR microcontroller. Any sound file chosen from computer can be integrated in microcontroller programming which is written in C and compiled by AVR libc compiler. An 8 bit DAC connected to PORT A of AVR microcontroller takes data of s...

Ivermectin is a widely used anthelmintic drug whose nematocidal mechanism is incompletely understood. We have used Caenorhabditis elegans as a model system to understand ivermectin's effects. We found that the M3 neurons of the C.elegans pharynx form fast inhibitory glutamatergic neuromuscular synapses. avr-15, a gene that confers ivermectin sensitivity on worms, is necessary postsynaptically f...

In the paper, we study the problems of nearest neighbor queries (NN) and all nearest neighbor queries (ANN) on location data, which have a wide range of applications such as Geographic Information System (GIS) and Location based Service (LBS). We propose a new structure, termed AVR-Tree, based on the R-tree and Voronoi diagram techniques. Compared with the existing indexing techniques used for ...

BACKGROUND Type I aortic dissection develops in 0.6% of patients late after aortic valve replacement (AVR), and 13% of patients with type I aortic dissections have a history of AVR. Predictors of aortic dissection at AVR, however, have not been characterized. METHODS AND RESULTS A study group of 33 patients with type I aortic dissection had aortic surgery 49+/-55 months after routine AVR. A g...