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曾光杰 《重庆广播电视大学学报》2005,17(1):46-48
本文讨论了一种基于CY7C09449PV芯片的PCI总线接口电路方案的设计,着重分析了如何设计硬件电路和驱动程序. 相似文献
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Effect of a distal protection device on epicardial blood flow and myocardial perfusion in primary percutaneous coronary intervention 总被引：2，自引：0，他引：2
Objective: The beneficial effect of percutaneous coronary intervention (PCI) in patients with acute myocardial infarction (AMI) has been well established, but there is the problem of no-reflow phenomenon which is an adverse prognostic factor in primary PCI. In the present study the effect of a distal protection device (PercuSurge GuardWire; GW) on epicardial blood flow and myocardial perfusion was evaluated. Methods and Results: Patients with AMI were randomly divided into 2 groups, the GW and the control groups. The GW group included 52 patients with AMI who underwent primary PCI with GW protection and the control group included 60 patients who underwent primary PCI without GW protection. Epicardial blood flow in the infarct-related artery (IRA) and myocardial perfusion were evaluated according to the thrombolysis in myocardial infarction (TIMI) flow grade and the myocardial blush grade (MBG). We found TIMI score of 3 was obtained significantly more frequently in the GW group (96%) than in the control group (80%). The MBG score of 3 was obtained also significantly greater in the GW group (65%) than in the control group (33%). Conclusion: Primary PCI with GW protection can significantly improve epicardial blood flow and myocardial perfusion. 相似文献
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应用实时三维超声心动图评价冠心病患者经皮冠状动脉介入术(PCI)后左室收缩功能的变化。研究对象分为两组,正常组14例为冠脉造影无异常发现者,冠心病组49例行冠脉内支架治疗。所有患者均于术前及术后14天行实时三维超声检查,测得左室收缩末容积(LVESV)、左室舒张末容积(LVEDV)及左室射血分数(LVEF)。结果,正常组术前与术后LVESV、LVEDV及LVEF差异无统计学意义;冠心病组术后LVESV、LVEDV显著小于术前(P<0.001),LVEF显著高于术前(P<0.001)。结果表明,实时三维超声心动图能准确评价左室收缩功能,冠心病患者PCI后左室收缩功能明显改善。 相似文献
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基于LINUX平台的PCI数据采集卡驱动软件设计 总被引：2，自引：0，他引：2
许世富 《中国科学院研究生院学报》2002,19(4):447-451
以一种PCI数据采集卡为例,介绍在Linux操作系统中PCI设备的内核模块驱动程序设计.该驱动程序已成功地装入EPICS系统,建立了EPICS数据库与PCI数据采集卡的数据通道,在EPICS环境下通过了测试,为EPICS用户提供了一种新的可供选择的I/O接口设备 相似文献
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一种安全物理隔离系统的设计与实现 总被引：3，自引：0，他引：3
提出了一种基于PCI总线的物理隔离系统,该系统采用物理隔离技术、强身份认证技术、安全审计技术等实现内外网的物理隔离.利用PCI接口控制电路、网络接口电路和逻辑控制电路实现了系统的自适应网络功能和内外网的安全物理隔离,能自动识别所连接网络设备的速率和工作方式,并自动将工作方式和速率调整到正确的模式与之相适应.系统管理软件包括安全策略管理模块、安全审计模块、数据库记录交换模块、文件交换模块和邮件交换模块,以实现内外网数据安全高效的交换和管理;使用Windows DDK实现了基于NDIS的硬件驱动程序.系统原型已在湖北省公安消防总队政府上网工程中稳定高效地运行,其关键技术的实现对相关课题研究具有普遍意义. 相似文献
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王辉 《沈阳教育学院学报》2009,11(1):78-80
通过对2007年与2008年物价水平相关数据的比较,分析了2008年物价上涨的原因主要是原油价格上涨、原材料供不应求、成本上升、货币供应量过剩及累积效应等;提出了稳定物价的主要措施是增加战略物资储备、扩大内需、打击哄抬物价等。 相似文献
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赵彬 《蒙自师范高等专科学校学报》2006,4(2):1-4
PCI总线是一种高性能外围设备接口总线,已经广泛地被应用于嵌入式系统.由于PCI总线协议的复杂性,其接口实现比较困难.通过设计一种身份认证智能卡,介绍了利用PCI 9054实现嵌入式系统中FPGA与PCI总线接口的设计过程,并指出了开发过程中应注意的问题. 相似文献
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许世富 《中国科学院大学学报》2002,19(4):447-451
以一种PCI数据采集卡为例,介绍在Linux操作系统中PCI设备的内核模块驱动程序设计.该驱动程序已成功地装入EPICS系统,建立了EPICS数据库与PCI数据采集卡的数据通道,在EPICS环境下通过了测试,为EPICS用户提供了一种新的可供选择的I/O接口设备 相似文献
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Xin DU Jun-ping KANG Jia-hui WU Qiang LV Chao-shu TANG Chang-sheng MA 《Journal of Zhejiang University. Science. B》2010,11(8):548-552
Objective:Percutaneous coronary intervention(PCI) triggers an acute inflammatory response,while sirolimus is known to have anti-inflammatory properties;the inflammatory system response to PCI after sirolimus-eluting stent placement remains unclear.The purpose of this study is to determine the changes in high sensitive C-reactive protein(hs-CRP) and apelin after PCI procedure and drug-eluting stent implantation in patients with and without reduced left ventricular systolic function.Methods:Forty-eight consecutive patients undergoing PCI at the Beijing Anzhen Hospital between July and September 2006 were recruited.Sirolimus-eluting stents were employed in all patients.Blood samples were drawn immediately before and 24 h after the procedure.Plasma hs-CRP and apelin levels were determined by enzyme immunoassay.Results:Paired t-test revealed a significant increase in both hs-CRP and apelin post-procedure(P=0.006 and P0.0001,respectively).Patients with reduced left ventricular ejection fraction(LVEF) had significantly lower baseline apelin levels compared to those with normal ventricular function [(46.8±10.8) vs.(72.0±8.4) pg/ml,P0.001].However,apelin increased to a level similar to the level of those with normal left ventricular systolic function 24 h after the PCI procedure [(86.7±11.6) vs.(85.1±6.1) pg/ml,P=0.72].Conclusions:hs-CRP and apelin levels increased after PCI and sirolimus-eluting stent implantation.Patients with impaired left ventricular systolic function had significantly lower baseline apelin levels,which increased significantly after PCI. 相似文献