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find Keyword "离散度" 6 results
  • 体外循环先天性心脏病纠治术对QT离散度的影响及意义

    目的 研究体外循环心脏不停跳心内直视术纠治先天性心脏病对QT离散度(QTd)的影响及其意义.方法 记录20例先天性心脏病纠治术患者术前、术终和术后7天内同步12导联心电图,测定各时间点QTd值和QT离散度校正值(QTcd).结果 术终及术后QTd和QTcd明显升高(P<0.05),术后第2天达最高值,虽然术后第7天仍未能恢复至术前水平,但总体表现为一个缓慢回落的趋势.1例术后频发室性早搏患者及1例术后死于阵发性室性心动过速导致的心跳骤停患者的QTd和QTcd明显高于均值.结论 体外循环直视手术纠治先天性心脏病患者术终、术后QTd和QTcd明显增高,提示心肌细胞复极受影响,与麻醉及手术操作等有关.QTd与QTcd亦有可能作为评价心脏外科手术后心律失常和预后的指标.

    Release date:2016-08-30 06:35 Export PDF Favorites Scan
  • Analysis on Relationship between P Wave Dispersion and Inflammatory Markers

    【摘要】 目的 探讨炎性标志物高敏C反应蛋白(highsensitivity creaction protein ,hsCRP)、纤维蛋白原(fibrinogen, FIB)与P波离散度(P wave dispersion, PWD)的关系。 方法 回顾分析2005年1〖CD3/5〗8月收治的102例心脏病住院患者的临床资料,分别测量PWD和获得hsCRP、FIB血浓度,对比分析炎性标志物和PWD之间的关系。 结果 心脏病住院患者的PWD (408±93) ms、hsCRP (368±317) mg/L和FIB (411±294) g/L均较正常值高。PWD异常组和正常组的血hsCRP分别为(482±211)、(193±093) mg/L,差异有统计学意义(Plt;001);血FIB分别为(510±348)、(251±129) g/L,差异有统计学意义(Plt;005)。血hsCRP增高组PWD(549±96) ms,较正常组(285±74) ms显著增大(Plt;001),血FIB增高组PWD(479±68) ms,较正常组(359±87) ms显著增大(Plt;005)。PWD与血hsCRP成正相关(相关系数R=0418,Plt;005);PWD与血FIB成正相关(相关系数R=0292,Plt;005)。 结论 PWD与血炎性标志物密切相关,血炎性标志物增高的患者PWD增大。【Abstract】〓Objective〓〖WT5”BZ〗To investigate the relationship between P wave dispersion (PWD) and inflammatory marker (serum highsensitivity creaction protein, hsCRP and fibronogen,FIB). Methods Retrospectively measure PWD of 102 inpatients with heart diseases,and get the results of the hsCRP and FIB. Results The average PWD (408±93) ms of 102 inpatients is higher than normal value,the average hsCRP (368±317) mg/L and FIB (411±294) g/L are higher than normal value. The serum concentration of the hsCRP and FIB increase significantly in abnormal PWD subgroup than normal PWD subgroup, respectively [(482±211) mg/L vs (193±093) mg/L, Plt;001 and (510±348) g/L vs (251±129) g/L, Plt;005)]. The PWD of the serum highconcentration hsCRP and FIB subgroup increase than normalconcentration subgroup significantly, respectively [(549±96) ms vs (285±74) ms, Plt;001 and (479±68) ms vs (359±87) ms,Plt;005] PWD has positive relationship with hsCRP(R=08,Plt;005)and FIB (R=0292,Plt;005). Conclusions PWD has good relationship with serum inflammtory makers, PWD increases with the ascending of concentration of the serum hsCRP and FIB.

    Release date:2016-09-08 09:45 Export PDF Favorites Scan
  • Effects of Angiotensin Ⅱ Receptor Blocker on P Wave Deviation Degree in Patients with Paroxysmal Atrial Fibrillation

    目的:探讨血管紧张素Ⅱ受体拮抗剂(ARB)对PAF患者P波离散度的影响。方法:观察48 例阵发性AF患者的最宽P 波和P 波离散度,并与ARB干预治疗3 个月后进行对比分析。结果:ARB治疗3个月后最宽P波、P 波离散度及P 波离散度≥40 ms的例数与治疗前比较差异有统计学意义 (Plt;0.05或lt;0.01)。结论:ARB能减轻PAF患者心房结构重构及电重构,减少AF的发生。

    Release date:2016-09-08 10:00 Export PDF Favorites Scan
  • Effects of Tandospirone on Cardiac Autonomic Nervous System in Patients with Anxiety and Depression after Intracoronary Stent Implantation

    ObjectiveTo investigate the effects of a new anti-anxiety-depression drug tandospirone on heart rate variability (HRV) and QT-dispersion in patients with anxiety and depression after intracoronary stent implantation. MethodsEighty-six anxious and depressive patients after intracoronary stent implantation during May 2011 and May 2013 were treated by tandospirone for 6 weeks. We evaluated the changes of HRV and QT dispersion before and after anti-anxiety-depression treatment. ResultsAfter six weeks of treatment, the HRV was increased obviously (P<0.05) and the QT dispersion was decreased significantly (P<0.01). ConclusionThe new anti-anxiety-depression drug tandospirone is effective on cardiac autonomic nervous system in patients with anxiety and depression after intracoronary stent implantation. And the drug is secure with a low rate of adverse reactions.

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  • 多模态磁共振成像在儿童癫痫中的研究应用

    癫痫是常见的神经系统疾病,病理生理机制复杂,一部分患者难以找到病因。核磁共振成像(MRI)是癫痫诊断,尤其在癫痫灶定位方面的一项重要的影像学技术。随着功能磁共振技术(fMRI)的不断进步,在癫痫的诊治中日益突出,可以从生化微结构水平及脑网络方面探讨其发病机制,对明确病因具有重要意义,从而有助于实施个体化精准治疗,文章综述了近年来多模态 MRI 技术在癫痫领域的应用。

    Release date:2018-09-18 10:17 Export PDF Favorites Scan
  • Brain tissue microstructure parameters estimation method based on proximal gradient network

    Diffusion tensor imaging technology can provide information on the white matter of the brain, which can be used to explore changes in brain tissue structure, but it lacks the specific description of the microstructure information of brain tissue. The neurite orientation dispersion and density imaging make up for its shortcomings. But in order to accurately estimate the brain microstructure, a large number of diffusion gradients are needed, and the calculation is complex and time-consuming through maximum likelihood fitting. Therefore, this paper proposes a kind of microstructure parameters estimation method based on the proximal gradient network, which further avoids the classic fitting paradigm. The method can accurately estimate the parameters while reducing the number of diffusion gradients, and achieve the purpose of imaging quality better than the neurite orientation dispersion and density imaging model and accelerated microstructure imaging via convex optimization model.

    Release date:2021-06-18 04:50 Export PDF Favorites Scan
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