نتایج جستجو برای: میکروکنترلر avr
تعداد نتایج: 2584 فیلتر نتایج به سال:
BACKGROUND The survival of patients who undergo aortic valve replacement (AVR) for severe aortic stenosis with reduced preoperative ejection fractions (EFs) is not well described in the literature. METHODS AND RESULTS Patients undergoing AVR for severe aortic stenosis were analyzed using the Northern New England Cardiovascular Disease Study Group surgical registry. Patients were stratified by...
در این پروژه برای سیستم دینامیکی مشخص ، که معادلات غیرخطی آن در دست است ، پس از بنا کردن طرح کلی سیستم کنترل، با استفاده از نرم افزار matlab کنترل کننده ها طراحی شده اند. سپس با استفاده از نرم افزار simnon شبیه سازی مجموعه سیستم کنترل به همراه معادلات غیرخطی سیستم دینامیکی بصورت حل ریاضی این مجموعه انجام شده است . کنترل کننده های طراحی شده با استفاده از یک میکروکنترلر 87c51 gb ساخته شده اند. رو...
BACKGROUND Studies assessing the differential impact of sex on outcomes of aortic valve replacement (AVR) yielded conflicting results. We sought to investigate sex-related differences in AVR utilization, patient risk profile, and in-hospital outcomes using the Nationwide Inpatient Sample. METHODS AND RESULTS In total, 166 809 patients (63% male and 37% female) who underwent AVR between 2003 a...
OBJECTIVES This study utilizes Markov decision analysis to assess the relative benefits of prophylactic aortic valve replacement (AVR) at the time of coronary artery bypass graft surgery (CABG). Multiple sensitivity analyses were also performed to determine the variables that most profoundly affect outcome. BACKGROUND The decision to perform CABG or concomitant CABG and AVR (CABG/AVR) in asym...
Background/Introduction Benefits of sutureless aortic valve replacement (AVR) have been established. Most western centres have reported advantages in reduced cardiopulmonary bypass, cross clamp, ventilation, and postoperative recovery time. It has established a role in moderate to high-risk surgical patients requiring an AVR. However, the incidence of postoperative atrial fibrillation (POAF) in...
BACKGROUND The interaction between valvular aortic stenosis (AS) and arterial stiffness, as well as the impact of aortic valve replacement (AVR) on arterial stiffness, remains unclear. In this study, we aimed to evaluate the degree of AS severity on non-invasive pulse wave velocity (PWV) measurements. We also searched whether the AVR procedure favorably affects PWV. METHODS In all, 38 patient...
OBJECTIVES The goal of this study was to compare long-term survival and valve-related complications between bioprosthetic and mechanical heart valves. BACKGROUND Different heart valves may have different patient outcomes. METHODS Five hundred seventy-five patients undergoing single aortic valve replacement (AVR) or mitral valve replacement (MVR) at 13 VA medical centers were randomized to r...
Xenotransplantation may provide the only solution to the shortage of human donor organs. Although hyperacute rejection associated with xenotransplantation can now be overcome, acute vascular rejection (AVR) remains a primary barrier to xenotransplantation. To date, standard immunosuppressive agents fail to block AVR or prolong xenograft survival. The present study was undertaken to determine th...
This paper present a new method to determine the optimal tuning of the PID controller parameter of an AVR system using Modified particle swarm optimization (MPSO) algorithm. the AVR is not robust to variations of the power system parameters therefore, it is necessary to use PID controller To increase the stability and performance of the AVR system. Fast tuning of optimum PID controller paramete...
Many plant pathogenic bacteria possess a conserved protein secretion system that is thought to transfer Avr (avirulence) proteins, with potential activities in both parasitism and defense elicitation, into plant cells. avr genes may be acquired horizontally by these bacteria, and avr gene compositions are highly variable. In the past year, heterologous expression experiments have revealed that ...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید