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1.
冠心病患者同型半胱氨酸代谢相关酶基因多态性的研究   总被引:26,自引:0,他引:26  
目的 研究冠心病患者同型半胱氨酸代谢相关酶甲烯四氢叶酸还原酶(MTHFR)基因C677T和胱硫醚缩合酶(CBS)基因T833C位碱基突变。方法 对209例冠心病患者和101例健康对照者,采用多聚酶链反应-限制性内切酶片段长度多态性技术检测MTHFRC677T基因型,用扩增阻滞突变体系法检测CBS基因T833C多态性,采用高压液相色谱法测定同型半胱氨酸血浆水平。结果 患者组MTHFR基因T纯合基因型  相似文献
2.
不同剂量卡维地洛防治大鼠急性心肌梗死左室重构的研究   总被引:14,自引:1,他引:13  
目的对比观察不同剂量卡维地洛对大鼠急性心肌梗死(AMI)左室重构(LVRM)的防治作用。方法雌性SD大鼠AMI术后成活142只,分为AMI对照组(n=35),和卡维地洛大剂量(10mg·kg-1·d-1,n=37),中剂量(1mg·kg-1·d-1,n=35),及小剂量(0.1mg·kg-1·d-1,n=35)四组。另设假手术组对照。直接灌胃给药4周后行血流动力学测定、心脏标本固定及病理分析。去除梗死面积<35%或>55%者,最终58只大鼠资料完整。结果AMI各组间梗死面积均无显著差异(44.5%~46.3%,P均>0.05)。与假手术组相比,AMI组的左室舒张末压(LVEDP)、容积(LVV)、实际左心室重量(LVAW)及相对重量(LVRW)均显著增加(P均<0.01),左室球形指数和左室内压最大上升和下降速率(±dp/dt)及其校正值(±dp/dt/LVSP)均显著降低(P均<0.01)。与AMI组相比,卡维地洛大、中、小剂量组的LVEDP、LVV、LVAW和LVRW均呈剂量相关性显著降低(LVEDP7.7mmHg±1.9mmHg,12.1mmHg±2.0mmHg,14.5mmHg±4.6mmHg对24.5mmHg±5.3mmHg;LVV0.72ml±0.10ml,0.79ml±0.08ml,0.82ml±0.10ml对0.92ml±0.11ml;LVAW589mg±57mg,622mg±70mg,666mg±57mg对730mg±79mg;P<0.05~0.001),±dp/dt及±dp/dt/LVSP均显著增加(P<0.05~0.01),但各剂量组间均无显著差异,左室球形指数仅在大剂量组显著改善(P<0.05)。结论卡维地洛大、中、小剂量均能有效地防止大鼠AMI左室重构,改善血流动力学和左室功能;小剂量有效,大剂量更好。  相似文献
3.
心血管病介入性放射学技术及应用研究   总被引:5,自引:0,他引:5  
中国医学科学院阜外心血管病医院自1982年8月开展心血管病介入性放射学技术及应用研究以来,至1995年10月共实行了1852例各类心血管病介入性治疗,共计27项。总技术成功率97.35%(1803/1852),并发症发生率4.3%(79/1852),死亡率0.16%(3/1852),急症手术率0.32%(6/1852)。现报告如下。 (一)瓣膜病介入治疗包括二尖瓣球囊成形术(PBMV)813例,主动脉瓣球囊成形术2例。年龄15~68岁,其中合并房颤患者151例,合并轻度二尖瓣关闭不全者51例,合并轻中度主  相似文献
4.
Objective To assess the feasibility, efficiency and selectivity of adenovirus- mediated ge ne transfer to local arterial wall by protein- coated metallic stent. Methods A replication- defective recombinant adenovirus carrying the Lac Z reporter gene for nuclear- specific β- galactosidase (Ad- βgal) was used in this study. Th e coating for metallic stent was made by immersing it in a gelatin solution cont aining crosslinker. The coated stents were mounted on a 4. 0 or3. 0mmpe rcutaneous transluminal coronary angioplasty (PTCA) balloon and submersed into a high- titer Ad- βgal viral stock (2×10(10)pfu/ml) for 3 min, and then im planted into the carotid arteries in 4 mini- swines and into the left anterior d escending branch of the coronary artery in 2 mini- swines via 8F large lumen gui ding catheters. The animals were sacrificed7 (n=4), 14 (n=1) and 21 (n=1) days after implantation, respectively. The β- galactosidase expression was as sessed by X- gal staining. Results The results showed that the expression of transgene was detected in all animal. In 1 of carotid artery with an intact intima, the β- gal expression was l imited to endothelial cells. In vessels with denuded endothelium, gene expressi on was found in the sub- intima, media and adventitia. The transfection efficie ncy of medial smooth muscle cells was 38. 6%. In 2 animals sacrificed 7 days af ter transfection, a microscopic examination of X- gal- stained samples did not s how evidence oftransfection in remote organs and arterial segments adjacent to the treated arterial site.Conclusions Adenovirus- mediated arterial gene transfer to endothelial, smooth muscle cells and adventitia by protein- coated metallic stent is feasible. The transfection efficiency is higher. The coated stent may act as a good carrier of adenovirus - mediated gene transfer and have a potential to prevent restenosis following PT CA.  相似文献
5.
目的研究冠心病(CAD)患者亚甲基四氢叶酸还原酶(MTHFR)A1298C和胱硫醚缩合酶(CBS)G919A基因多态性。方法MTHFR基因A1298C多态性检测采用限制性内切酶片段长度分析法(RFLP),CBS基因G919A多态性检测采用扩增阻滞突变体系(ARMS)方法,血浆Hey水平测定采用高压液相色谱分析法。结果MTHFR基因1298位点在冠心病组和正常组各1例CC纯合子,AC杂合型频率在冠心病组(11.7%)低于正常对照组(21.4%),患者组和正常对照组基因型比例之间差异有显著性意义(U=20914.5,P〈0.05),但各基因型之间血浆Hey水平差异无显著性意义(P〉0.05)。CBS基因G919A多态性患者组和正常对照组基因型比例之间差异无显著性意义(X^2=4.956,P〉0.05),各基因型之间血浆Hey水平差异无显著性意义(P〉0.05)。结论MTH-FR基因A1298C与冠心病可能有一定关系,CBS基因G919A多态性与冠心病无明显关系,两者均不影响血浆Hey水平。  相似文献
6.
Objectives. To compare the effects of losartan, enalapril and their combination in the prevention of left ventricular remodeling (LVRM) after acute myocardial infarction (AMI) in the rat.Methods. AMI model was induced in female SD rats by ligating left coronary artery. Forty-eight hours after the procedure, 83 surviving rats were randomized into one of the following 4 groups : 1) AMI control group (n = 19), 2) losartan group (n =22, 3 mg · kg-1 · d-1), 3) enalapril group (n =20, 1mg · kg-1· d-1), 4) losartan - enalapril combinative group (n = 22, 3 and 1mg · kg-1 · d-1 respectively). 5) sham-operated group (n = 10) and 6) normal rats group (n = 10) were selected randomly to serve as non-infarction controls. Losartan and enalapril were delivered by direct gastric gavage. After 4 weeks of medical therapy, hemodynamic studies were performed in each group, then the rat hearts were fixed with 10% formalin and pathologic analysis on them was performed. Complete experimental data was obtained in 56 rats,  相似文献
7.
大、中、小剂量依那普利防治大鼠AMI左室重构的作用对比   总被引:1,自引:0,他引:1  
目的 对比大、中、小剂量依那普利 (Enla)对大鼠AMI左室重构 (LVRM)的防治作用 ,并评价其量效关系。方法  97只雌性SD大鼠 ,AMI术后 4 8小时随机分成 :(1)AMI对照 ,(2 )Enla大剂量 (10mg·kg 1·d 1) ,(3)Enla中剂量 (1mg·kg 1·d 1)和 (4)Enla小剂量 (0 1mg·kg 1·d 1)四组。另设 :(5 )假手术和 (6 )正常组作对照。给药治疗 4周后均行血流动力学测定、心脏标本固定及病理分析。最终 6 7只大鼠获完整资料 ,在上述各组中的数目分别为 13、13、12、12、8和 9只。结果 AMI各组间梗塞面积均无显著差异 (45 4 % - 4 7 4 % ,P均 >0 0 5 )。与假手术组相比 ,AMI组左室舒张未压 (LVEDP)、容积 (LVV)、长 (L)、短 (D)轴长度和左室实际 (LVAW )及相对重量 (LVRW)均显著增加 (P均 <0 0 0 1) ,发生了LVRM ;而左室内压最大上升和下降速率 (±dp/dt)及其校正值均显著降低 (P <0 0 1- 0 0 0 1)。与AMI组相比 ,Enla大、中、小剂量三组的LVEDP、LVV、L以及LVAW和LVRW均显著降低或减小 (P <0 0 5 - 0 0 0 1) ,其中LVEDP、LVV、L和LVAW在大剂量组均比小剂量组降低或减小更显著 (P均 <0 0 5 ) ;而±dp/dt校正值在大、中剂量二组显著恢复 (P <0 0 5 - 0 0 1)。结论  1 Enla大、中、小剂量均能有效防治AMI大#0;  相似文献
8.
卡维地洛对猪急性心肌梗死再灌注后无再流的影响   总被引:1,自引:0,他引:1  
目的:评价卡维地洛防治猪急性心肌梗死(AMI)再灌注后无再流的作用.方法:将中华小型猪24只随机分成对照组、卡维地洛组1mg/(kg·d)和假手术组,每组8只.冠状动脉结扎3h,松解1h制备AMI再灌注模型.AMI前、后和再灌注后均行血流动力学测定和心肌声学造影(MCE)检查,最终行病理学分析.结果:①与AMI前相比,对照组AMI后3h主动脉收缩和舒张压(SBP和DBP)、左室收缩压(LVSP),心排量(CO)和左心室内压最大收缩和舒张变化速率(±dp/dtmax)均显著下降(P<0.05),肺毛细血管楔压(PCWP)和左室舒张末压(LVEDP)均显著升高(P<0.01);再灌注后1h仅LVSP显著恢复(P<0.05),±dp/dtmax继续显著下降(P<0.05);而卡维地洛组AMI后3h各项指标变化与对照组相同;但再灌注后1hLVSP,LVEDP,±dp/dtmax和CO均显著恢复(P<0.05)且比对照组更显著(P<0.05).②对照组MCE和病理染色所测的冠脉结扎区心肌范围(LA)高度一致,再灌注后无再流面积(ANR)分别为78.5%和82.3%,心肌坏死面积(NA)占LA的98.5%;而卡维地洛组%LA虽与对照组相当,但两方法所测ANR仅分别为24.9%和25.8%,NA仅为74.4%,均显著小于对照组(P<0.05).③对照组再灌注即刻和再灌注后1h冠脉血流量仅占AMI前的45.8%和50.6%(P<0.01),而卡维地洛组冠脉血流量分别提高到70.6%和74.1%,均比对照组显著增加(P<0.01).结论:卡维地洛能有效地防治AMI再灌注后无再流,改善其心功能,缩小梗死面积.  相似文献
9.
The effect of sublingual administration and intravenous drip of nitroglycerin (SLNTG and IVNTG) on left ventricular volumes (LVVs) were studied and systolic function was quantitatively assessed with two-dimensional echocardiography (2DE) in 28 patients with myocardial infarction (MI), including 13 cases without heart failure (MI-NHF) in one group and 15 with heart failure (MI-HF) in another. The results showed that after SLNTG and IVNTG in both groups the heart rate (HR) increased significantly (P< 0.05-0.001); the systolic blood pressure (SBP) decreased significantly (P< 0.05-0.001); the diastolic blood pressure (DBP) was not significantly changed (all P>0.05); the left ventricular end-diastolic and end-systolic volumes (EDV and ESV) both significantly reduced [EDV: decreased by 5.8-11.6% (-13.2-19.0 ml), P< 0.05-0.001; ESV: decreased by 9.6-16.6% (-8.6-17.3 ml), P< 0.05-0.001)1; the left ventricular ejection fraction (LVEF) all significantly elevated (increased by 6.6%-9.4% (3.2%-3.4%), P < 0.05-0.001  相似文献
10.
急性心肌梗塞(AMI)具有典型的发病症状和心电图改变者,及时诊断一般不堆,但AMI的临床表现差异极大,如不注意识别,易延缓诊断、误诊或漏诊。下面谈谈应注意的一些问题。一、AMI发病症状与冠状动脉病变间的关系 (一)冠状动脉粥样硬化在冠状动脉粥样硬化病变基础上,特别是原管腔较通畅者,突然发生急性  相似文献
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