26 research outputs found
Spin-Orbit-Induced Magnetic Anisotropy for Impurities in Metallic Samples I. Surface Anisotropy
Motivated by the recent measurements of Kondo resistivity in thin films and
wires, where the Kondo amplitude is suppressed for thinner samples, the surface
anisotropy for magnetic impurities is studied. That anisotropy is developed in
those cases where in addition to the exchange interaction with the impurity
there is strong spin-orbit interaction for conduction electrons around the
impurity in the ballistic region. The asymmetry in the neighborhood of the
magnetic impurity exhibits the anisotropy axis which, in the case of a
plane surface, is perpendicular to the surface. The anisotropy energy is
for spin , and the anisotropy constant is
inversionally proportional to distance measured from the surface and
. Thus at low temperature the spin is frozen in a singlet or doublet of
lowest energy. The influence of that anisotropy on the electrical resistivity
is the subject of the following paper (part II).Comment: 28 pages, RevTeX (using epsfig), 8 eps figures included, submitted to
PR
Outcomes in Transcatheter Aortic Valve Replacement for Bicuspid Versus Tricuspid Aortic Valve Stenosis
Cardiolog
GENDER RELATED DIFFERENCES IN PATIENTS UNDERGOING TRANSFEMORAL AORTIC VALVE IMPLANTATION FOR SEVERE AORTIC STENOSIS
Cancer in patients with severe aortic stenosis undergoing transcatheter aortic valve replacement: Is it malignant or benign?
FEVER FOLLOWING TRANSCATHETER AORTIC VALVE IMPLANTATION: PREVALENCE, PATTERN AND RATE ATTRIBUTED TO AN INFECTIOUS ORIGIN
COMPARISON OF THE HEMODYNAMIC PERFORMANCE AND MID–TERM OUTCOME OF PERCUTANEOUS VERSUS SURGICAL STENTLESS BIOPROSTHESES FOR AORTIC STENOSIS WITH ANTICIPATED PATIENT PROSTHESIS MISMATCH
The impact of lockdown enforcement during the SARSCoV-2 pandemic on the timing of presentation and early outcomes of patients with ST-elevation myocardial infarction.
IntroductionEarly reports described decreased admissions for acute cardiovascular events during the SarsCoV-2 pandemic. We aimed to explore whether the lockdown enforced during the SARSCoV-2 pandemic in Israel impacted the characteristics of presentation, reperfusion times, and early outcomes of ST-elevation myocardial infarction (STEMI) patients.MethodsA multicenter prospective cohort comprising all STEMI patients treated by primary percutaneous coronary intervention admitted to four high-volume cardiac centers in Israel during lockdown (20/3/2020-30/4/2020). STEMI patients treated during the same period in 2019 served as controls.ResultsThe study comprised 243 patients, 107 during the lockdown period of 2020 and 136 during the same period in 2019, with no difference in demographics and clinical characteristics. Patients admitted in 2020 had higher admission and peak troponin levels, had a 2.4 fold greater likelihood of Door-to-balloon times> 90 min (95%CI: 1.2-4.9, p = 0.01) and 3.3 fold greater likelihood of pain-to-balloon times> 12 hours (OR 3.3, 95%CI: 1.3-8.1, pConclusionsThe lockdown imposed during the SARSCoV-2 pandemic was associated with a significant lag in the time to reperfusion of STEMI patients. Measures to improves this metric should be implemented during future lockdowns