Abstract   Despite sophisticated conventional medical treatment and the continued development   and improvement of coronary revascularization modalities in recent years, a significant   number of patients still suffer from refractory angina pectoris and cannot be successfully   managed. Advances in therapeutic options have led to an increase in the average of life   expectancy even in such ...

Abstract: A pulse-echo technique, based on ultrasonic "long-bar" mode (LBM) velocity measurements, working up to 1700°C is described. Magnetostrictive transducers and ultrasonic lines used in a 40-85 kHz frequency range are detailed. The conditions of choice of fundamental parameters (frequency, line geometry, sample size) are discussed in relation with the nature and the microstructure of ...

PURPOSE OF REVIEW Induction treatment of antineutrophil cytoplasmic antibodies (ANCA) associated vasculitis (AAV) is not always successful and nonresponding patients are considered refractory. RECENT FINDINGS Refractory disease should be subdefined to the treatment that was received. Cyclophosphamide refractory AAV occurs in up to 5% of patients. Many more patients develop contraindications t...

background: ventriculoatrial (va) conduction has an important role in the initiation and maintenance of some arrhythmias. the aim of this study was to evaluate whether clinical and electrophysiological parameters of atrioventricular (av) conduction can predict va conduction. methods: detailed demographic, electrocardiographic, and echocardiographic data were recorded in 54 consecutive patients ...

silica refractory bricks are used especially in the metallurgical industries, due to desirable properties suchas high melting point, rigidity, and high temperatures strength. in this research, different amount of sicwere added to silica refractory containing different binders such as borax, boric acid, calcium nitride,sodium tri poly phosphate, sodium hexa meta phosphate (shmp) and lime. physic...

Initial stages of the refractory degradation process by molten Al-5Mg alloy were investigated analyzing structures caused an interaction with metal during heat cycles. The aggregate, found to be poly-crystalline, consisting cristobalite (SiO2) and mullite (Al6Si2O13), was deteriorated ahead surrounding matrix. Metal permeated into refractory, forming a thin layer along crucible surface below li...