However, failure of the active-fixation mechanism was more frequent among leads implanted <1 year before versus >1 year before (OR 6.8, 95% CI 1.1-42.7, P = 0.043). In 38% of patients with failure of the active-fixation mechanism, a previous lead reposition had been attempted before lead removal Cilengitide chemical structure due to significant pacing threshold rise.
Conclusions: In our series, the active-fixation mechanism failed in up to 22.5% of explanted leads. This may have important clinical implications during active-fixation lead removal and reposition. (PACE 2011; 34:1217-1224)”
“Cryptococcus neoformans is an environmental yeast that is a leading cause of fatal mycosis in AIDS
patients and a major cause of meningoencephalitis and CNS-related mortality around the globe. Although C. neoformans infection is mostly a manifestation of immune deficiency, up to 25% of cases reported in the USA occur in patients without recognizable immune defects, indicating that C. neoformans can develop mechanisms
that allow it to evade immune defenses and persist in noncompromised hosts. This article discusses mechanisms and routes of infection and the most important elements of host response as well as the mechanisms that promote cryptococcal survival within the host. Metabolic adaptation to physiological host conditions and the mechanisms limiting immune recognition, interfering with phagocytosis and extending intracellular survival of C. neoformans are highlighted. We describe the mechanisms by which C. neoformans can alter adaptive host responses, especially cell-mediated immunity, Salubrinal manufacturer Ruboxistaurin molecular weight which is required for clearance of this microbe. We also review cryptococcal strategies of survival in the CNS and briefly discuss adaptations developing in response to medical treatment.”
“FePd-alloy epitaxial films were prepared on MgO substrates of (100) (B1), (110)(B1), and (111)(B1) orientations at a temperature of 600 degrees C by ultrahigh vacuum rf magnetron sputtering. The structural and the magnetic properties vary depending on the substrate orientation. L1(0)-FePd(001)
films are obtained on MgO(100)(B1) substrates, whereas L1(0)-FePd(101) films with the c-axis canted from the perpendicular direction are epitaxially grown on MgO(111)(B1) substrates with six variants. FePd epitaxial films consisting of L1(0)(100) and L1(0)(112) crystals are formed on MgO(110)(B1) substrates. A higher long range ordering parameter is obtained on the order of FePd/MgO(100)(B1)>(110)(B1)>(111)(B1). The films grown on MgO(100)(B1) substrates show perpendicular magnetic anisotropy, whereas the films grown on MgO(110)(B1) and MgO(111)(B1) substrates are easily magnetized in in-plane directions. The magnetization properties reflect the magnetocrystalline anisotropies of bulk L1(0)-FePd crystal. (C) 2011 American Institute of Physics. [doi: 10.1063/1.