排序方式: 共有92条查询结果,搜索用时 15 毫秒
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采用结扎SD大鼠左冠状动脉前降支模型,术后一周开始应用人参与电针治疗2周,大鼠的室颤阈(VFT)明显升高。证明人参与电针均可有效防治心梗后期实验性心律失常。通过受体药理分析发现:人参与电针均明显降低缺血性心肌对异丙肾上腺素(ISO)致颤的敏感性。人参与电针防治心梗后期心律失常的机制可能系通过对β受体的调节作用 相似文献
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酶学诊断急性心梗的意义 总被引:1,自引:0,他引:1
酶学诊断急性心梗的意义总参第四门诊部李玉祯,张帆,张敏心肌梗塞急性期病势凶险。病死率高。其近期及远期预后在很大程度上取决于早期诊断和积极治疗。用于诊断AMI的手段近十年虽有不少进展,但主要仍依靠临床表现、心电图及酶三方面。通常以此三者具备作为诊断依据... 相似文献
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心房梗塞占心肌梗塞的0.7%~42%,但因其缺乏典型的临床症状,多合并有心室梗塞,故往往被忽视。作者曾报告了人体心房Ta波的描记方法。深入研究心房缺血、梗塞时Ta波变化的规律,可为临床上心房梗塞的诊断提供实验根据。为此,本研究通过结扎离体豚鼠心房动脉,以模拟缺 相似文献
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回顾分析老年人急性心肌梗塞(AMI)患者7l例发病48小时内首次心电图(ECG)的QT间期离散度(QTd)及JT间期离散度(JTd)进行测定。结果显示:AMI早期原发性室颤患者QTd及JTd显著高于非室颤组(QTdl05.75±34.76ms,47.92±16.83ms,P<0.0l。JTdl08.31±31.91ms,51.94±18.71ms,P<0.01)。提示:QTd或JTd增加,发生室颤可能性增大。QTd和(或)JTd可作为早期评估老年AMI的预后参考指标。 相似文献
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目的:探讨急性心肌梗死并发严重心律失常的影响因素,为其临床防治提供参考依据.方法:选择2011年3月~2012年7月发生AMI24小时以内就诊并住院的63名患者为研究对象,按照是否发生严重心律失常分为A组(发生严重心律失常组)和B组(未发生心律失常组)两组,分别记录和分析患者的性别、年龄、发病时间、既往病史、不良习惯,以及入院时心肌酶、血常规检查及心电图检查结果.结果:A组患者的白细胞总数及中性粒细胞数均显著多于B组,但发病时间明显短于B组,差异有统计学意义(P<0.005),而两组的中性粒细胞比率、CK、CK-MB值、性别、年龄、心电图是否出现Q波、既往病史及不良习惯比较,差异均无统计学意义(P>0.05).多因素Logistic回归分析结果表明仅发病时间、中性粒细胞计数与急性心肌梗死患者并发严重心律失常有明显的相关性(P均<0.05).结论:发病时间、中性粒细胞计数>7× 109/L是急性心肌梗死患者并发严重心律失常的危险因素. 相似文献
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本研究观察了江浙蝮蛇抗栓酶(svate)对缺血心肌电生理学变化的影响。结果表明,静脉注射svate,使阻断冠脉后兔血小板聚集功能和心脏电生理各指标变化明显减轻。缺血50min时,血小板聚集率仅增加4±13%,静息电位减小15.8±0.1%,动作电位幅度降低17.8±0.1%,复极化50%和90%时程分别缩短12.3±0.1%及延长4±0.1%,不应期差值为4.2±7.8%,室颤阈(VFT)降低15.4±8.1%,与单纯阻断组各参数的百分率变化相比,p值均<0.01,证明svate具有改善有效不应期和提高VFT的作用。 相似文献
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柯为 《中国生物工程杂志》1987,7(5):73-73
血清中高水平的胆固醇是动脉硬化和心肌梗塞的危险因素之一,也是一项重要指标国外曾从诺卡氏菌细胞中提取胆固醇氧化酶获得成功,并商品生产,用于临床。我国也开展这方面研究,从链霉菌菌丝体分离出胆固醇氧化酶(上海医工院),也有用诺卡氏菌获得胆固醇氧化酶(河北微生物研究所)。但他们获得的胆固醇氧化酶为胞内酶,活性单位低,工艺也较复杂。 相似文献
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体外化学诱导人骨髓间充质干细胞分化为心肌样细胞 总被引:7,自引:0,他引:7
Feng Cao Li Li Niu Ling Meng Lian Xu Zhao Ming Zheng Wen Yue Ci Xian Bai Guo Liang Jia Xue Tao Pei 《实验生物学报》2004,37(2):118-124
To investigate the potential of adult mesenchymal stem cells (hMSCs) derived from human bone marrow to undergo cardiomyogenic differentiation after exposure of 5-azacytidine in vitro. A small bone marrow aspirate was taken from the iliac crest of human volunteers, and hMSCs were isolated by 1.073 g/mL Percoll and cultured in the right cell culturing medium as previously described. The phonotypes of hMSCs were identified by flow cytometry. The stem cells were cultured in cell culture medium (as control) and medium mixed with 5-azacytidine (5-aza, 3, 5, 10 micromol/L) (n=5, respectively) for cellular differentiation. We examined respectively with immunohischemistry at 21 days of inducement on desmin, cardiac-specific cardiac troponin I (cTnI), GATA4 & connexin43. The ultrastructures of induced cells were examined by transmission electron microscope. The results indicated that the hMSCs showed a fibroblast-like morphology with vortex distribution in their peak propagation, and express high level of CD44 but negative for CD34 and CD45. 20%-30% cells grown after 5, 10 microl/L 5-aza treatment connected with adjoining cells and coalesced into myotube structures after 14 days. After 21 days of culturing, immunohistochemistry revealed expression of desmin, GATA4, cTnI and connexin43 in 5, 10 micromol/L showed positive, but no cardiac specific protein were found in neither 3 micromol/L nor in control group. The ratio of cTnI positive stained cells in 10 micromol/L group were higher than that in 5 micromol/L group (65.3+/-4.7% vs 48.2+/-5.4%, p<0.05). Electron microscopy revealed myofilaments were formed. The results indicated that purified hMSCs from adult bone marrow can be differentiated into cardiac-like muscle cells with 5-aza inducement in vitro and the differentiation is in line with the 5-aza concentration. 相似文献
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