Based on the natural frame in the projective geometry, motions of curves in projective geometry are studied. It is shown that several integrable equations including Sawada-Kotera and KK equations arise from motion of ...Based on the natural frame in the projective geometry, motions of curves in projective geometry are studied. It is shown that several integrable equations including Sawada-Kotera and KK equations arise from motion of plane curves in projective geometries. Motion of space curves described by acceleratlon field and governed by endowing an extra space variable in similarity geometry P^3 is also studied.展开更多
We present theoretical studies for second-and third-order elastic constants in NaBH_(4) based on ab initio calculations.Our calculated second−order elastic constants agree well with available experimental results.The ...We present theoretical studies for second-and third-order elastic constants in NaBH_(4) based on ab initio calculations.Our calculated second−order elastic constants agree well with available experimental results.The anharmonic properties of NaBH_(4),such as pressure derivative of the second−order elastic constants and the Grüneisen constants for long-wavelength acoustic mode γ(q,j),are characterized using the third-order elastic constants.展开更多
Background Polymer coating on coronary stents induces vascular inflammatory response, reduces re-endothelialization, and affects long-term outcome after percutaneous coronary intervention （PCI）. The SERY-1 registry ...Background Polymer coating on coronary stents induces vascular inflammatory response, reduces re-endothelialization, and affects long-term outcome after percutaneous coronary intervention （PCI）. The SERY-1 registry aimed to determine whether a novel polymer-free paclitaxel-eluting microporous Yinyi stent could improve 1-year outcome after index procedure in real-world clinical practice. Methods Clinical and angiographic data and follow-up outcome were collected in 1045 patients who underwent PCI with implantation of 〉1 Yinyi stents between June 2008 and August 2009 at 27 medical centers. The primary endpoint was the cumulative rate of composite major adverse cardiac events （MACE） and the secondary endpoint was the incidence of stent thrombosis at 1 year. Results Overall, 1376 lesions were treated successfully with 1713 Yinyi stents, and 1019 （98.7%） patients received dual antiplatelet therapy for at least 12 months. During 1-year follow-up, 8 patients （0.78%） had cardiac death, 6 （0.58%） suffered non-fatal myocardial infarction, and 46 （4.46%） underwent repeat PCI due to recurrence of angina, resulting in 1-year MACE-free survival of 94.09%. Stent thrombosis occurred in 10 （0.97%） patients, and the rate of Academic Research Consortium （ARC） definite or probable stent thrombosis was 0.78%. Conclusions Polymer-free paclitaxel-eluting microporous Yinyi stent is effective and safe for interventional treatment of coronary artery disease in real-world clinical practice, without recourse to carrier polymer. Potential long-term clinical advantages of this stent deserve further investigation.展开更多
Background Several studies have shown that coronary stenting reduces the frequency of clinical and angiographic restenosis in patients with mild to moderate renal insufficiency. However, less is known about the long-t...Background Several studies have shown that coronary stenting reduces the frequency of clinical and angiographic restenosis in patients with mild to moderate renal insufficiency. However, less is known about the long-term benefits of stent use in this population. This study was aimed to determine the impact of coronary stenting on extended （5 years） long-term outcomes of patients with chronic renal insufficiency. Methods The study included 602 consecutive patients who underwent successful percutaneous coronary intervention with stenting. Renal insufficiency was defined as an estimated glomerular filtration rate 〈60 rrd.min-1-｜.73 m-2. The major adverse cardiac events were compared for patients with （n=160） and without （n=442） renal insufficiency. Results After the third year of follow-up, nonfatal myocardial infarction and revascularization rates were significantly increased in patients with renal insufficiency compared with those without renal dysfunction （16.9% vs 7.7%, P=0.001; 29.4% vs 15.8%, P 〈0.001）. In patients who had recurrent cardiovascular events, a significantly higher rate of de novo stenosis revascularization was found in patients with renal insufficiency than without renal insufficiency （57.7% vs 22.7%, P 〈0.001）, while there was no significant difference in target lesion revascularization between the groups （51.9% vs 43.6%, P=0.323）. Multivariate analysis demonstrated an independent impact of the presence of renal insufficiency on the major adverse cardiac events （hazard ratio： 1.488, 95% confidence interval： 1.051-2.106, P=0.025） and de novo stenosis （hazard ratio： 5.505, 95% confidence interval： 2.151-14.090, P 〈0.001）. Conclusions The late major adverse cardiac events, after successful coronary stenting, is increased in patients with an estimated glomerular filtration rate 〈60 ml.min-1.1.73m-2. This might be associated with increased risk of de novo stenosis in this population. Chin Med J 2009; 122（2）： 158-164展开更多
Background Recent studies have showed that the fine mesh stents are associated with a significant reduction in both clinical and angiographic re-stenosis of the coronary arteries. To maintain a very satisfactory radio...Background Recent studies have showed that the fine mesh stents are associated with a significant reduction in both clinical and angiographic re-stenosis of the coronary arteries. To maintain a very satisfactory radio-opacity using the stents, Guidant of the USA has designed a new type of bare metal stents （BMS）-Multi-link （ML） Vision / ML MiniVision stents. The clinical outcomes of Asian patients with coronary artery disease （CAD） after implanting the Multi-link Vision or MiniVision stent were investigated in this study. Methods An observational, prospective, multi-center, non-randomized post marketing registry was conducted to demonstrate the efficacy of the BMS- ML Vision / ML MiniVision stents. The primary end point of the registry was clinical target lesion revascularization （TLR） at a 6-month follow-up. The major secondary end points included the rate of major adverse cardiac events （MACE） and serious adverse events （SAE） in hospital and at 6 months; and the rate of clinical TLR as a function of the type of angina. A total of 429 Asian people with 449 lesions from 14 centers were selected for this study, The average reference diameter of the lesions was （3.0±0.5） mm, and the mean length was （15.7±5.0） mm. Results The successful rate of the procedure was 99.3%. Twenty-five percent of the lesions were treated by direct stenting without pre-dilation. Eighty-six percent of the lesions were implanted with ML Vision stent. After the 6-month follow-up, the rate of clinical TLR was 1.4%. The MACE, SAE and target vessel revascularization （TVR） were 6.8%, 3.5% and 1.4% respectively. Conclusion The current registry showed the excellent 6-month clinical outcomes of ML Vision/ML MiniVision stents in Asian patients with CAD.展开更多
基金The project supported in part by National Natural Science Foundation of China under Grant No. 10371098 and the Natural Science Foundation of Shaanxi Province of ChinaIt is my pleasure to thank Prof. Qu Chang-Zheng for his helpful discussion
文摘Based on the natural frame in the projective geometry, motions of curves in projective geometry are studied. It is shown that several integrable equations including Sawada-Kotera and KK equations arise from motion of plane curves in projective geometries. Motion of space curves described by acceleratlon field and governed by endowing an extra space variable in similarity geometry P^3 is also studied.
基金by the National Natural Science Foundation of China under Grants Nos 10647008,10674028,50971099the Department of Education of Shaanxi Province of China under Grant No.09JK752.
文摘We present theoretical studies for second-and third-order elastic constants in NaBH_(4) based on ab initio calculations.Our calculated second−order elastic constants agree well with available experimental results.The anharmonic properties of NaBH_(4),such as pressure derivative of the second−order elastic constants and the Grüneisen constants for long-wavelength acoustic mode γ(q,j),are characterized using the third-order elastic constants.
文摘Background Polymer coating on coronary stents induces vascular inflammatory response, reduces re-endothelialization, and affects long-term outcome after percutaneous coronary intervention （PCI）. The SERY-1 registry aimed to determine whether a novel polymer-free paclitaxel-eluting microporous Yinyi stent could improve 1-year outcome after index procedure in real-world clinical practice. Methods Clinical and angiographic data and follow-up outcome were collected in 1045 patients who underwent PCI with implantation of 〉1 Yinyi stents between June 2008 and August 2009 at 27 medical centers. The primary endpoint was the cumulative rate of composite major adverse cardiac events （MACE） and the secondary endpoint was the incidence of stent thrombosis at 1 year. Results Overall, 1376 lesions were treated successfully with 1713 Yinyi stents, and 1019 （98.7%） patients received dual antiplatelet therapy for at least 12 months. During 1-year follow-up, 8 patients （0.78%） had cardiac death, 6 （0.58%） suffered non-fatal myocardial infarction, and 46 （4.46%） underwent repeat PCI due to recurrence of angina, resulting in 1-year MACE-free survival of 94.09%. Stent thrombosis occurred in 10 （0.97%） patients, and the rate of Academic Research Consortium （ARC） definite or probable stent thrombosis was 0.78%. Conclusions Polymer-free paclitaxel-eluting microporous Yinyi stent is effective and safe for interventional treatment of coronary artery disease in real-world clinical practice, without recourse to carrier polymer. Potential long-term clinical advantages of this stent deserve further investigation.
基金This study was supported by the grants from the National Natural Science Foundation of China （No. 30830056） and the National 973 Program （No. 2006CD 503904）.
文摘Background Several studies have shown that coronary stenting reduces the frequency of clinical and angiographic restenosis in patients with mild to moderate renal insufficiency. However, less is known about the long-term benefits of stent use in this population. This study was aimed to determine the impact of coronary stenting on extended （5 years） long-term outcomes of patients with chronic renal insufficiency. Methods The study included 602 consecutive patients who underwent successful percutaneous coronary intervention with stenting. Renal insufficiency was defined as an estimated glomerular filtration rate 〈60 rrd.min-1-｜.73 m-2. The major adverse cardiac events were compared for patients with （n=160） and without （n=442） renal insufficiency. Results After the third year of follow-up, nonfatal myocardial infarction and revascularization rates were significantly increased in patients with renal insufficiency compared with those without renal dysfunction （16.9% vs 7.7%, P=0.001; 29.4% vs 15.8%, P 〈0.001）. In patients who had recurrent cardiovascular events, a significantly higher rate of de novo stenosis revascularization was found in patients with renal insufficiency than without renal insufficiency （57.7% vs 22.7%, P 〈0.001）, while there was no significant difference in target lesion revascularization between the groups （51.9% vs 43.6%, P=0.323）. Multivariate analysis demonstrated an independent impact of the presence of renal insufficiency on the major adverse cardiac events （hazard ratio： 1.488, 95% confidence interval： 1.051-2.106, P=0.025） and de novo stenosis （hazard ratio： 5.505, 95% confidence interval： 2.151-14.090, P 〈0.001）. Conclusions The late major adverse cardiac events, after successful coronary stenting, is increased in patients with an estimated glomerular filtration rate 〈60 ml.min-1.1.73m-2. This might be associated with increased risk of de novo stenosis in this population. Chin Med J 2009; 122（2）： 158-164
文摘Background Recent studies have showed that the fine mesh stents are associated with a significant reduction in both clinical and angiographic re-stenosis of the coronary arteries. To maintain a very satisfactory radio-opacity using the stents, Guidant of the USA has designed a new type of bare metal stents （BMS）-Multi-link （ML） Vision / ML MiniVision stents. The clinical outcomes of Asian patients with coronary artery disease （CAD） after implanting the Multi-link Vision or MiniVision stent were investigated in this study. Methods An observational, prospective, multi-center, non-randomized post marketing registry was conducted to demonstrate the efficacy of the BMS- ML Vision / ML MiniVision stents. The primary end point of the registry was clinical target lesion revascularization （TLR） at a 6-month follow-up. The major secondary end points included the rate of major adverse cardiac events （MACE） and serious adverse events （SAE） in hospital and at 6 months; and the rate of clinical TLR as a function of the type of angina. A total of 429 Asian people with 449 lesions from 14 centers were selected for this study, The average reference diameter of the lesions was （3.0±0.5） mm, and the mean length was （15.7±5.0） mm. Results The successful rate of the procedure was 99.3%. Twenty-five percent of the lesions were treated by direct stenting without pre-dilation. Eighty-six percent of the lesions were implanted with ML Vision stent. After the 6-month follow-up, the rate of clinical TLR was 1.4%. The MACE, SAE and target vessel revascularization （TVR） were 6.8%, 3.5% and 1.4% respectively. Conclusion The current registry showed the excellent 6-month clinical outcomes of ML Vision/ML MiniVision stents in Asian patients with CAD.
