BACKGROUND The incremental cost-effectiveness of transapical transcatheter aortic valve implantation (TAVI) is ill-defined in high-risk patients where aortic valve replacement (AVR) is an option, and has not been ascertained outside a randomized controlled trial. METHODS We developed a Markov model to examine the progression of patients between health states, defined as peri- and post-procedu...

Transcutaneous aortic valve replacement (AVR) is increasingly used for high-risk patients with severe aortic stenosis, who have high operative mortality for surgical placement during cardiopulmonary bypass (CPB). Retrograde transfemoral AVR is usually performed during sedation, whereas antegrade transapical AVR is done with general anesthesia. Both procedures can be carried out without CPB. Ext...

The optimal design of the automatic voltage regulators for a synchronous machine are positively reflected on quality stability. This paper is concerned with an AVR by adopting three control techniques. first one was designed according to traditional proportional integration-derived (PID) controller while fuzzy logic adopted in second powerful controller, finally PID regulator (AVR) based techno...

One of the most crucial control aspects in electric power networks is ensuring constant voltage levels throughout different circumstances. To overcome this problem, an automatic regulator (AVR) installed electrical to preserve at its allowable range. In paper, a fuzzy-based PID controller was used enhance AVR dynamic performance under several operating conditions. Moreover, Equilibrium Optimize...

OBJECTIVE To determine the extent to which differences in generic quality of life (QOL) between transcatheter aortic valve implantation (TAVI) and surgical aortic valve replacement (AVR) patients explained by EuroSCORE and heart-team operability assessment. METHODS A total of 146 high-risk patients with EuroSCORE > 6 and aged ≥ 75 years underwent TAVI (n = 80) or aortic valve replacement (n =...

OBJECTIVES Minimally invasive aortic valve replacement (Mini-AVR) is a technically advanced procedure. However, it results in equivalent operative mortality, less bleeding and reduced intensive care/hospital stay when compared with conventional AVR. Our aim was to assess the impact of trainee performance on short-term outcomes of patients undergoing elective and urgent Mini-AVR where a signific...

This paper presents an automatic application that provides several retinal image analysis functionalities, namely vessel segmentation, vessel width estimation, artery/vein classification and optic disc segmentation. A pipeline of these methods allows the computation of important vessel related indexes, namely the Central Retinal Arteriolar Equivalent (CRAE), Central Retinal Venular Equivalent (...

We have read the interesting article by Elmistekawy et al. [1], which showed that preoperative haemoglobin (Hb) was an independent predictor of mortality after aortic valve replacement (AVR) [1]. Although the authors defined that anaemia depends on gender and showed no difference in the incidence of preoperative anaemia between both males and females [1], we believe that gender should be consid...