Objective To determine the extent to which differences in generic quality of life （QOL） between transcatheter aortic valve implanta- tion （TAVI） and surgical aortic valve replacement （AVR） patients explained by ...Objective To determine the extent to which differences in generic quality of life （QOL） between transcatheter aortic valve implanta- tion （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 = 66） between February 2010 and July 2013. A total of 75 patients also completed preoperative and six month SF-12 QOL measures. Analyses examined incident major morbidity, compared six month QOL between groups adjusted for EUroSCORE and operability, and quantified rates of clinically significant QOL improvement and deterioration. Results The AVR group required longer ventilation （〉 24 h） （TAVI 5.0% vs. AVR 20.6%, P = 0.004） and more units of red blood cells [TAVI 0 （0-1） vs. AVR 2 （0-3）, P = 0.01]. New renal failure was higher in TAVI （TAVI 5.0% vs. AVR 0%, P = 0.06）. TAVI patients reported significantly lower vitality （P = 0.01） by comparison to AVR patients, however these findings were no longer significant after adjustment for operability. In both procedures, clinically significant QOL improvement was common [range 25.0% （general health） - 62.9% （physical role）] whereas deterioration in QOL occurred less frequently [range 9.3% （physical role） - 33.3% （mental health）]. Conclusions Clinically significant improvement and deterioration in QOL was evident at six months in high risk elderly aortic valve replacement patients. Overall QOL did not differ between TAVI and AVR once operability was taken into consideration.展开更多
A subgroup H of a finite group G is called semipermutable if it is permutable with every subgroup K of G with （｜H｜ ｜K｜） = 1, and s-semipermutable if it is permutable with every Sylow p-subgroup of G with （p, ｜...A subgroup H of a finite group G is called semipermutable if it is permutable with every subgroup K of G with （｜H｜ ｜K｜） = 1, and s-semipermutable if it is permutable with every Sylow p-subgroup of G with （p, ｜H｜） = 1. In this paper, we investigate the influence of s-semipermutablity of some subgroups of prime power order of a finite group on its supersolvablility.展开更多
A matrix whose entries are +,-, and 0 is called a sign pattern matrix. Let k be arbitrary positive integer. We first characterize sign patterns A such that .Ak≤0. Further, we determine the maximum number of negative ...A matrix whose entries are +,-, and 0 is called a sign pattern matrix. Let k be arbitrary positive integer. We first characterize sign patterns A such that .Ak≤0. Further, we determine the maximum number of negative entries that can occur in A whenever Ak≤0. Finally, we give a necessity and sufficiency condition for A2≤0.展开更多
Galvanic replacement reactions have been widely used to transform solution dispersed silver template structures into intricate nanoshell geometries. Here, we report on the use of these same reactions to form hollow su...Galvanic replacement reactions have been widely used to transform solution dispersed silver template structures into intricate nanoshell geometries. Here, we report on the use of these same reactions to form hollow substrate-supported Au-Ag nanoshells from silver templates having a heteroepitaxial relationship with the underlying single crystal substrate. The structures obtained exhibit a nanohut geometry, show highly tunable plasmonic properties and are formed as periodic arrays using a lithography-free technique. When removed from the substrate the inverted nanohuts appear as nanobowls with a notch in the rim. The study lays the groundwork for wafer-based devices utilizing nanoshells located at site-specific locations.展开更多
文摘Objective To determine the extent to which differences in generic quality of life （QOL） between transcatheter aortic valve implanta- tion （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 = 66） between February 2010 and July 2013. A total of 75 patients also completed preoperative and six month SF-12 QOL measures. Analyses examined incident major morbidity, compared six month QOL between groups adjusted for EUroSCORE and operability, and quantified rates of clinically significant QOL improvement and deterioration. Results The AVR group required longer ventilation （〉 24 h） （TAVI 5.0% vs. AVR 20.6%, P = 0.004） and more units of red blood cells [TAVI 0 （0-1） vs. AVR 2 （0-3）, P = 0.01]. New renal failure was higher in TAVI （TAVI 5.0% vs. AVR 0%, P = 0.06）. TAVI patients reported significantly lower vitality （P = 0.01） by comparison to AVR patients, however these findings were no longer significant after adjustment for operability. In both procedures, clinically significant QOL improvement was common [range 25.0% （general health） - 62.9% （physical role）] whereas deterioration in QOL occurred less frequently [range 9.3% （physical role） - 33.3% （mental health）]. Conclusions Clinically significant improvement and deterioration in QOL was evident at six months in high risk elderly aortic valve replacement patients. Overall QOL did not differ between TAVI and AVR once operability was taken into consideration.
基金NNSF of China (10471085)NSF of Shanxi Province of China (20011004)Key Proj. of Ministry of Education(02023)the Returned Overseas Students Foundation of Shanxi Province of China ([2004]7)
文摘A subgroup H of a finite group G is called semipermutable if it is permutable with every subgroup K of G with （｜H｜ ｜K｜） = 1, and s-semipermutable if it is permutable with every Sylow p-subgroup of G with （p, ｜H｜） = 1. In this paper, we investigate the influence of s-semipermutablity of some subgroups of prime power order of a finite group on its supersolvablility.
基金Supported by Shanxi Natural Science Foundation(20011006)
文摘A matrix whose entries are +,-, and 0 is called a sign pattern matrix. Let k be arbitrary positive integer. We first characterize sign patterns A such that .Ak≤0. Further, we determine the maximum number of negative entries that can occur in A whenever Ak≤0. Finally, we give a necessity and sufficiency condition for A2≤0.
文摘Galvanic replacement reactions have been widely used to transform solution dispersed silver template structures into intricate nanoshell geometries. Here, we report on the use of these same reactions to form hollow substrate-supported Au-Ag nanoshells from silver templates having a heteroepitaxial relationship with the underlying single crystal substrate. The structures obtained exhibit a nanohut geometry, show highly tunable plasmonic properties and are formed as periodic arrays using a lithography-free technique. When removed from the substrate the inverted nanohuts appear as nanobowls with a notch in the rim. The study lays the groundwork for wafer-based devices utilizing nanoshells located at site-specific locations.
