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find Keyword "风湿性二尖瓣狭窄" 3 results
  • 风湿性二尖瓣狭窄心房颤动患者HCN4基因cDNA序列测定及mRNA的表达

    摘要: 目的 通过分析风湿性心脏病二尖瓣狭窄患者心房肌组织超级化激活环核苷酸调控通道基因家族4(HCN4)基因表达与心房颤动发生的关系,为探讨心房颤动发生的机制奠定理论基础。 方法 52例风湿性二尖瓣狭窄患者,根据是否合并心房颤动将其分为两组,实验组:38例,男18例,女20例;年龄26~68岁,平均年龄46.47岁;均合并心房颤动。对照组:14例,男6例,女8例;年龄21~62岁,平均年龄42.93岁;不合并心房颤动。提取并逆转录两组患者心房肌组织中HCN4基因的总核糖核酸(RNA),应用SYBR GreenⅠ荧光染料, 建立检测 HCN4基因信使RNA(mRNA)的实时荧光定量聚合酶链反应 (PCR)法,并对PCR产物测序进行分析。根据标准曲线计算出两组心房肌组织中HCN4基因 mRNA含量,并以HCN4基因mRNA和内参β肌动蛋白(β-actin)含量的比值作为评价HCN4基因mRNA表达水平指标。 结果 测定HCN4基因cDNA 序列同源性为100%。建立的实时荧光定量 PCR方法在103~107拷贝数/μl的标准品梯度稀释范围内r为0.999。实验组HCN4基因mRNA与β-actin含量的相对表达值比值与对照组比较明显升高(1.323±1.226 vs. 0.116±0.192,P<0.05)。 结论 实时荧光定量PCR对HCN4基因mRNA能进行准确定量,HCN4基因的过度转录表达提示其可能参与了调控风湿性二尖瓣狭窄心房颤动的发生过程。

    Release date:2016-08-30 06:01 Export PDF Favorites Scan
  • Real-time Three-dimensional Echocardiography (RT-3DE) Application in Evaluation of Left Ventricular Motion in Patients with Rheumatic Mitral Stenosis

    ObjectiveTo evaluate myocardial segmental motion function in left ventricular of patients with rheumatic mitral stenosis by using the technology of real-time three-dimensional echocardiography (RT-3DE). MethodsWe retrospectively analyzed the clinical data of 14 patients with rheumatic mitral stenosis between October and November 2014 in our hospital as a trial group. There were 4 males and 10 females with a mean age of 50.9±9.0 years ranging from 34 to 64 years. We chose 11 healthy individuals as a control group. There were 7 males and 4 females with a mean age of 49.5±9.7 years ranging from 32 to 67 years. Both the two groups were subjected to myocardial performance evaluation using two-dimensional echocardiography (2DE) and real-time three-dimensional echocardiography (RT-3DE) to examine the left ventricular ejection fraction (LVEF), left ventricular end-diastolic volume (LVEDV), left ventricular end systolic volume (LVESV), longitudinal strain, circumferential strain, area strain, and lateral strain of each left ventricular myocardial segments. Result RT-3DE detected that the trial group had significantly lower values of LVEF, LVEDV and LVESV than those of the control group (P < 0.05). RT-3DE also revealed that the trial group had a significantly weaker longitudinal strain than the control group (P < 0.05). ConclusionRT-3DE is an accurate technology for assessing myocardial motion and function in patients with rheumatic mitral valve disease.

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  • Research progress of surgical treatment without valve replacement for rheumatic mitral stenosis

    Rheumatic mitral stenosis is one of the most common cardiac valvulopathies in our country, which is relatively rare in European and American countries. Medical therapy is reserved mainly for the treatment of complications, which can not fundamentally change the valve structure. Only surgical treatments can correct these valve lesions, including closed mitral commissurotomy, percutaneous balloon mitral valvuloplasty, mitral valve repair under direct vision and mitral valve replacement. Numerous studies demonstrate that valve repair provides better long-term results, though it occupies a low proportion clinically. This article reviewed domestic and foreign literature concerning surgical treatments for patients with rheumatic mitral stenosis to provide some reference for the peers.

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