Search results for "Unstable"
showing 10 items of 111 documents
Axial resonances in the open and hidden charm sectors
2007
13 pages, 2 figures.-- PACS nrs.: 11.10.St, 11.80.Gw, 12.39.Hg, 12.39.Fe.-- ISI Article Identifier: 000249271600001.-- ArXiv pre-print available at: http://arxiv.org/abs/0704.2314
Invariant mass spectrum and α-n correlation function studied in the fragmentation of 6He on a carbon target
1998
13 pags, 5 figures.-- PACS nrs.: 24.60.−t; 25.70.Ef; 27.20.+n.
Hidden Oscillations in Electromechanical Systems
2016
In this paper an electromechanical system with two different types of motor is considered. It is shown that during the spin-up, the system with DC motor may experience unwanted vibration—the Sommerfeld effect. This is a well-known effect when the motor of electromechanical system gets stuck near the resonance zone instead of reaching its nominal power. The absence of this effect is demonstrated in the system with synchronous motor. Nowadays, there are many works devoted to the study of this effect in various systems. Here we discuss the Sommerfeld effect from the point of view of localization of the so-called hidden oscillations.
Cardiovascular Events in Moderately to Severely Obese Obstructive Sleep Apnea Patients on Positive Airway Pressure Therapy.
2016
<b><i>Background:</i></b> In moderately to severely obese patients with obstructive sleep apnea (OSA), the effects of long-term positive airway pressure (PAP) treatment on cardiovascular risk are poorly defined. <b><i>Purpose:</i></b> To assess the effect of continuous positive airway pressure (CPAP) or noninvasive ventilation (NIV) on the occurrence of cardiovascular events in obese OSA patients. <b><i>Methods:</i></b> We performed a noninterventional observational study in obese OSA patients recruited between 2007 and 2010 at the Sleep Center, University of Grenoble, treated with CPAP or NIV, and followed for 5.6 year…
Moderne Therapie bei akutem Koronarsyndrom
2002
Inhibition of platelet aggregation with aspirin and anticoagulation with unfractionated heparin can be considered the gold standard treatment of patients with acute coronary syndromes. Replacement of unfractionated heparins by low-molecular weight heparins seem to further improve the cardiovascular risk. Additional treatment with glycoprotein IIb/IIIa receptor blockers led to a further reduction of the clinical event rate, especially in patients undergoing coronary interventions during an acute coronary syndrome (more than 30% relative risk reduction). However, the latter substances did only lead to marginal improvements in the setting of a conservative stabilization of patients with acute …
Guideline-adherence and perspectives in the acute management of unstable angina - Initial results from the German chest pain unit registry.
2015
Abstract Background We investigated the current management of unstable angina pectoris (UAP) in certified chest pain units (CPUs) in Germany and focused on the European Society of Cardiology (ESC) guideline-adherence in the timing of invasive strategies or choice of conservative treatment options. More specifically, we analyzed differences in clinical outcome with respect to guideline-adherence. Method Prospective data from 1400 UAP patients were collected. Analyses of high-risk criteria with indication for invasive management and 3-month clinical outcome data were performed. Guideline-adherence was tested for a primarily conservative strategy as well as for percutaneous coronary interventi…
Estratificación del riesgo de pacientes con dolor torácico sin elevación del segmento ST en la puerta de urgencias
2003
Objectives. To investigate the prognostic factors in patients who come to the emergency room with chest pain but without ST segment elevation. Patients and method. 743 consecutive patients were evaluated by recording clinical history, electrocardiogram and troponin I determination, and early (< 24 h) exercise testing was done for the low-risk subgroup of patients (n = 203). All patients were followed during 3 months for major events (acute myocardial infarction or death). Results. Major events occurred in 71 patients (9.6%). Multivariate analysis (C stadistic = 0.79; 95% CI 0.730.84; p = 0.0001) identified the following predictors: age ≥ 72 years (OR = 1.7; 95% CI, 1.0-2.9; p = 0.05), insul…
Twelve-month outcomes after bioresorbable vascular scaffold implantation in patients with acute coronary syndromes. Data from the European Multicente…
2017
The aim of this study was to report on the midterm outcomes of patients undergoing percutaneous coronary intervention with bioresorbable vascular scaffolds (BVS) for the treatment of acute coronary syndromes (ACS) and compare with those of patients with stable coronary artery disease (sCAD).One thousand four hundred and seventy-seven (1,477) patients underwent implantation of one or more BVS (Absorb BVS; Abbott Vascular, Santa Clara, CA, USA) at 11 European centres and were included in the GHOST-EU registry. Admissions comprised 47.1% of the patients (951 BVS) with ACS, and 52.8% (1,274 BVS) with sCAD. During a median follow-up of 384 (359-460) days, patient-oriented endpoints (PoCE), inclu…
Rational and design of the European randomized Optical Coherence Tomography Optimized Bifurcation Event Reduction Trial (OCTOBER)
2018
Background Percutaneous coronary intervention in complex bifurcation lesions is prone to suboptimal implantation results and is associated with increased risk of subsequent clinical events. Angiographic ambiguity is high during bifurcation stenting, but it is unknown if procedural guidance by intravascular optical coherence tomography (OCT) improves clinical outcome. Methods and design OCTOBER is a randomized, investigator-initiated, multicenter trial aimed to show superiority of OCT-guided stent implantation compared to standard angiographic-guided implantation in bifurcation lesions. The primary outcome measure is a 2-year composite end point of cardiac death, target lesion myocardial inf…
Supervised Analysis for Phenotype Identification: The Case of Heart Failure Ejection Fraction Class
2021
Artificial Intelligence is creating a paradigm shift in health care, with phenotyping patients through clustering techniques being one of the areas of interest. Objective: To develop a predictive model to classify heart failure (HF) patients according to their left ventricular ejection fraction (LVEF), by using available data from Electronic Health Records (EHR). Subjects and methods: 2854 subjects over 25 years old with a diagnosis of HF and LVEF, measured by echocardiography, were selected to develop an algorithm to predict patients with reduced EF using supervised analysis. The performance of the developed algorithm was tested in heart failure patients from Primary Care. To select the mo…