乙醇对离体蟾蜍心脏活动及心肌酶的影响     

崔淑芹  刘淑萍  程秀臻 《潍坊教育学院学报》2009,(2):90-91

目的观察不同浓度乙醇按不同灌流顺序对离体蟾蜍心脏活动的影响,探讨其作用机制。方法蟾蜍24只,雌雄不限,随机分为正常对照组、乙醇浓度递增灌流组、乙醇浓度递减灌流组,每组8只。结果与正常对照组相比：两种灌流顺序的乙醇组都显示心率减慢（P〈0.01或P〈0．05）,心肌收缩幅度减小（P〈0．01）,心肌ATP酶和超氧化物歧化酶（SOD）含量减少（P〈0．01）,丙二醛（MDA）含量增多（p〈0．01）;递增组与递减组相比,无显著差异。结论急性乙醇中毒可导致离体蟾蜍心肌酶发生改变,对心率和心肌收缩幅度有抑制作用,且抑制作用呈浓度依赖性.  相似文献   

鸡胚绒毛尿囊膜血管新生的研究进展   总被引：1，自引：0，他引：1  

戴荣华  李林  曲巍  门振 《廊坊师范学院学报(自然科学版)》2009,9(2):70-73

鸡胚绒毛尿囊膜（chicken chorioallantoic membrane,CAM）是研究血管形成的理想体内模型,受精的鸡卵在胚胎发育过程中,绒毛尿囊膜的血管生长很旺盛。因此,以鸡胚绒毛尿囊膜模型来模拟血管新生成为研究热点。鸡胚绒毛尿囊膜技术是一种定性、定量研究体内血管新生的技术,它因具有实验材料易得、操作简便、实验周期短、不需要特殊设备、结果易于观察等优点而得到广泛应用。本文就国内外有关鸡胚绒毛尿囊膜血管新生特点、模型建立、血管测量方法等方面的研究进展作一综述。  相似文献   

音乐在PCI术后早期急性心肌梗死患者中的应用     

杨黎  黄惠根  吴兰笛  周英  王娇艳 《科技通报》2012,28(2):32-33

目的:探讨音乐应用于PCI术后早期急性心肌梗死患者的作用,促进患者康复.方法:便利抽样100名PCI术后AMI患者,分对照组和音乐组各50例,采用《HAD》和《AIS》调查并记录患者实验前后血压、心率、呼吸.结果:音乐组患者焦虑、睡眠质量、血压、心率、呼吸得分差值下降多于对照组,但抑郁得分较对照组高(P＜0.05).结论:音乐可缓解患者的焦虑,提高睡眠质量,维持血压、心率、呼吸处于相对较低水平.但音乐可释放抑郁情绪,应注意心理护理.  相似文献   

Diagnostic accuracy of heart fatty acid binding protein (H-FABP) and glycogen phosphorylase isoenzyme BB (GPBB) in diagnosis of acute myocardial infarction in patients with acute coronary syndrome     

Cubranic Z  Madzar Z  Matijevic S  Dvornik S  Fisic E  Tomulic V  Kunisek J  Laskarin G  Kardum I  Zaputovic L 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2012,22(2):225-236

Introduction:

This study aimed to assess whether heart fatty acid-binding protein (H-FABP) and glycogen phosphorylase isoenzyme BB (GPBB) could be used for the accurate diagnosis of acute myocardial infarction (AMI) in acute coronary syndrome (ACS) patients.

Materials and methods:

The study included 108 ACS patients admitted to a coronary unit within 3 h after chest pain onset. AMI was distinguished from unstable angina (UA) using a classical cardiac troponin I (cTnI) assay. H-FABP and GPBB were measured by ELISA on admission (0 h) and at 3, 6, 12, and 24 h after admission; their accuracy to diagnose AMI was assessed using statistical methods.

Results:

From 92 patients with ACS; 71 had AMI. H-FABP and GPBB had higher peak value after 3 h from admission than cTnI (P = 0.001). Both markers normalized at 24 h. The area under the receiver operating characteristic curves was significantly greater for both markers in AMI patients than in UA patients at all time points tested, including admission (P < 0.001). At admission, the H-FABP (37%) and GPBB (40%) sensitivities were relatively low. They increased at 3 and 6 h after admission for both markers and decreased again after 24 h. It was 40% for H-FABP and approximately 2-times lower for GPBB (P < 0.01). In AMI patients, both biomarkers had similar specificities, positive- and negative-predictive values, positive and negative likelihood ratios, and risk ratios for AIM.

Conclusion:

H-FABP and GPBB can contribute to early AMI diagnosis and can distinguish AMI from UA.  相似文献   

Role of l-Arginine on Dyslipidemic Conditions of Acute Myocardial Infarction Patients     

Pratima Tripathi  M. K. Misra  Shivani Pandey 《Indian journal of clinical biochemistry : IJCB》2012,27(3):296-299

Oxidative stress conditions associated with atherosclerosis leads to oxidative modification of low-density lipoprotein (LDL). The body’s capabilities to inhibit LDL oxidation and to remove or neutralize the atherogenic oxidized LDL (ox-LDL) are limited. When the LDL cholesterol level increases in the blood, it leads to dangerous consequences like atherosclerosis, leading to myocardial infarction. The major effect of an antioxidant in the LDL environment is to prevent the formation of ox-LDL (during atherogenesis. Strategies to reduce LDL oxidation and prevent atherogenesis can involve the enrichment of arterial cells with potent antioxidants that can prevent oxidative damage to the arterial wall. The objective of this study is to evaluate the effect of l-arginine on serum lipid and cholesterol levels in the patients of acute myocardial infarction (AMI). The study consisted of 70 AMI patients and 60 healthy individuals (serving as control) age 55–65 years. Serum levels of total cholesterol, high density lipoprotein (HDL), LDL and Triglycerides were determined on day 1 and day 15 of l-arginine administration (oral dose 3 g/day). The total cholesterol/HDL and the LDL/HDL ratio were calculated and compared. As per the observations, l-arginine administration was found to improve the lipid profile of the subjects. Hence it could be used as an adjuvant therapy for AMI and as a preventive measure for the onset of the disease in the healthy elderly also.  相似文献   

大负荷运动及恢复期大鼠心肌超微结构及心肌营养素-1的变化     

潘同斌  王雅一  左伟  唐芳 《北京体育大学学报》2012,35(12):53-56

摘要：目的：研究短期力竭运动及其恢复期间大鼠心肌超微结构及心肌营养素-1的变化。方法：8周龄健康雄性大鼠36只为研究对象,将其随即分为安静对照组(C)、力竭运动后即刻(Exhaustive,E0)、后12h组(E12)、后24h组(E24)、后48h组(E48)、后72h(E72)6组,每组6只。各运动组分别进行为期一周的力竭运动,安静对照组和力竭运动组分别于安静状态和末次力竭运动后不同时间点宰杀,迅速采取心肌样本,电镜观察大鼠心肌超微结构的变化,采用ELISA酶联免疫吸附反应法检测大鼠心肌营养素-1。结果：力竭运动后及恢复期心肌超微形态结构发生了不同程度的改变,其中以E0组和E24组较明显,心肌肌原纤维紊乱、扭曲,局部线粒体数量减少,甚至出现膨胀和变形。另一方面,大鼠在进行一周的大负荷运动后,心肌中的心肌营养素-1含量发生变化,力竭运动组(E0、E12、E24、E48、E72)与安静对照组相比都有显著性升高(P<0.01);其中,心肌营养素-1在E0组表达最显著,E72组有所回落(P<0.01)。结论：大负荷运动后及恢复期间,大鼠心肌内部结构遭到一定程度的破坏,同时大鼠心肌中的心肌营养素-1含量明显提高,且在E0组表达最高,提示大鼠心肌营养素-1在心肌损伤的修复中可能发挥重要作用。  相似文献   

饮食和运动干预对高脂饮食性肥胖大鼠心肌间质胶原纤维的影响     

李钢 《北京体育大学学报》2011,34(3):59-63

目的:研究饮食和运动干预对肥胖大鼠心肌间质胶原纤维的影响并对其可能的机制进行探讨。方法:将三周龄SD大鼠随机分为正常组和高脂饮食组,肥胖大鼠再分为肥胖对照组、饮食干预组与运动和饮食联合干预组,第16周时处死。用逆转录聚合酶链式反应(RT-PCR)法测定心肌ACEmRNA表达;羟脯氨酸法测定心肌胶原含量;采用双抗体夹心法ABC—ELISA测定血清PICP、PIHNP;苦味酸—天狼星红胶原染色大鼠心脏切片;免疫组化法测定心肌AT1受体和CTGF的表达。结果:肥胖大鼠存在严重的血脂紊乱,心肌胶原含量显著增加,血清1型前胶原羧基端肽、心肌组织ACEmRNA和AT1R、CTGF蛋白表达增加。饮食干预组血脂紊乱程度减轻,心肌胶原含量、血清1型前胶原羧基端肽、ACEmRNA和AT1R、CTGF表达均有降低、Ⅲ型前胶原氨基端肽表达有所升高;运动和饮食联合干预组体重下降明显,心肌胶原含量、血清1型前胶原羧基端肽、ACEmRNA和AT1R、CTGF表达下降更明显、Ⅲ型前胶原氨基端肽表达升高显著。结论:高脂性肥胖大鼠存在心肌间质胶原纤维化,并与ACEmRNA和AT1R、CTGF、血清1型前胶原羧基端肽表达的改变有关系。单纯性饮食疗法能够减缓心肌纤维化的进展,饮食和运动联合干预能够使心肌纤维化早期良性逆转。  相似文献   

碎裂QRS波对急性心肌梗死患者的短期预后评估(英文)简   总被引：2，自引：1，他引：1  

Qin-hui SHENG  Chih-Chi HSU  Jian-ping LI  Tao HONG  Yong HUO 《Journal of Zhejiang University. Science. B》2014,15(1):67-74

This study is aimed to investigate the clinical significance and the short-term prognostic value of frag- mented QRS （fQRS） for patients with acute myocardial infarction （AMI）. Three hundred patients with AMI were tested with retrospective analysis on the patients＇ clinical information, hospitalized treatment, fQRS onset time, location of lesions, and other relevant data, in order to assess the relationship between the presence of fQRS and its prognosis. The rates of malignant cardiac arrhythmia, left ventricular systolic dysfunction （LVSD）, and mortality in the positive fQRS group were 13.6%, 29.2%, and 23.7%, respectively, with all showing a p value 〈0.05. For the ST segment elevation myocardial infarction （STEMI） subgroup, all the rates showed significant differences with a p value 〈0.01, while for the non-STEMI （NSTEMI） subgroup showed no significant differences. In patients with a positive fQRS, there were no differences in malignant cardiac arrhythmia between patients with and without percutaneous coronary in- tervention （PCI） （p〉0.05）. As for the LVSD and mortality, the p values between patients with and without PCI were 0.031 and 0.000, respectively, suggesting statistical significance. The results imply that AMI patients with positive fQRS especially for the patients with STEMI had higher rates of malignant cardiac arrhythmia, LVSD, and mortality than the non-fQRS group. Patients of AMI with positive fQRS, who underwent early revascularization, could lower the incidence of the cardiovascular event. In addition, the presence of fQRS could be used as an indication of early in- tervention treatment for patients.  相似文献   

急性ST段抬高型心肌梗死继发心脏破裂的预测因素分析   总被引：2，自引：0，他引：2  

Geng QIAN  ;Chen WU  ;Yun-dai CHEN  ;Chen-chen TU  ;Jin-wen WANG  ;Yong-an QIAN 《Journal of Zhejiang University. Science. B》2014,15(12):1048-1054

研究目的：心脏破裂是急性ST段抬高型心肌梗死最严重的并发症之一,病情凶险,死亡率高。通过明确心肌梗死后出现心脏破裂并发症的危险因素,早期识别心脏破裂高危人群,有利于在急性心肌梗死的早期采取干预措施以减少心脏破裂的发生。创新要点：既往缺乏对中国sT段抬高型心肌梗死继发心脏破裂的系统风险评估,本研究采用回顾性队列研究的方法,完善并健全中国多中心的急性心肌梗死数据库,样本总量达到9798例,为国内同类研究中样本量最多。既往的国外文献报道：女性、高龄、心梗后就诊时间延迟、前壁心肌梗死、溶栓治疗等是心肌梗死后心脏破裂的独立危险因素。本研究在中国人群验证以上危险因素的基础上首次提出就诊时血色素下降及白细胞计数的升高与随后发生的心脏破裂密切相关。新的心脏破裂预测因素的发现有利于对心脏破裂更精细化的危险分层,早期识别心脏破裂高危人群。研究方法：建立中国多中心心肌梗死数据库,比较发生心脏破裂与未发生心脏破裂患者临床特点的差异,筛选敏感特异的心脏破裂的独立预测因素。重要结论：中国人群急性ST段抬高型心肌梗死后心脏破裂的发生率是1．82％,独立预测因素主要包括：高龄、女性、就诊时静息心率增快、前壁心肌梗死、心功能不全、就诊时间延迟、肾功能不全、贫血与白细胞计数升高。本文第一次提出就诊时贫血状态及白细胞计数的升高时与心脏破裂的发生直接相关。  相似文献   

对有氧运动(游泳)抗衰老作用的研究(二)——增龄小鼠心肌收缩蛋白ATPase活性、肌浆网SR Ca2+-ATPase活性的影响   总被引：5，自引：0，他引：5  

王安利  池健  相子春  王宁  宋纯理 《北京体育大学学报》2001,24(4):477-480

对不同年龄雄性小鼠进行研究,经七周有氧(游泳)训练,较系统的观察有氧运动训练对增龄小鼠的影响,研究认为:1)从3月到12月龄,心肌肌动球蛋白ATPase、肌球蛋白ATPase活性逐渐下降,增龄引起心肌收缩蛋白ATPase活性的降低.2)3月到12月龄,心肌SR Ca2+-ATPase活性也逐渐下降.3)8周游泳训练缓解了心肌收缩蛋白ATPase活性增龄性下降速度,改善了心肌肌浆网钙摄取功能的增龄性降低趋势.4)从心肌收缩蛋白及肌浆网ATPase变化看,老年期对一次急性运动的反应比年轻者更敏感,而游泳训练则能降低各年龄段对运动刺激的反应敏感性.5)8月龄,游泳训练对心肌收缩蛋白ATPase活性产生明显改善作用,而在12月龄游泳训练对SR Ca2+-ATPase活性的影响非常显著.在老年期心脏仍保持一定的可塑性而对运动训练产生适应.  相似文献