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1.
胃的 探讨ATP敏感钾通道(KATP)开放剂EMD56431对清醒自发性高血压大鼠(SHR)和肾性高血压大鼠(RHR)血压的影响。方法 采用静脉注射和灌胃给药的方式,经颈总动脉插管,动态监测动脉收缩压(SAP),舒张压(DAP)及心串(HR)的变化。并测定小鼠灌胃给予EMD56431时的半数致死剂量(LD50)。结果 静注或灌胃给予EMD56431,25、50、100μg/kg均可使SHR血压产生剂量依赖性的下降,同时反射性加快HR。前者降压维持时间分别为45min、6h和6h以上,后者可分别维持45min、lh和6h以上。静注和灌胃EMD56431产生的效应相当。灌胃EMD5643l亦可使RHR血压产生剂量依赖性的下降,降压维持时间分别为30min、45min和6h以上。小鼠LD50为8.54mg/kg,95%可信区限为7.87—9.93mg/kg。结论 EMD56431对SHR和RHR有显著而持久的降压作用,安全有效,且该药生物利用度较高,具有广阔的临床开发前景。  相似文献   

2.
目的:研究人参Rb组皂苷对急性心肌梗死犬心脏血流动力学及氧代谢的影响。方法:采用麻醉开胸犬结扎左冠状动脉前降支(LAD)产生急性心肌梗死模型,测定心脏血流动力学、冠状循环及氧化代谢等参数。结果:人参Rb组皂苷25,50mg/kg经十二指肠给药,对结扎LAD产生急性心肌梗死6h犬,均能明显减慢心率(HR),降低MAP、+dp/dtmax、LVEDP、LVWI及TPR,增加SI及-dp/dtmax,亦能明显增加冠脉血流量,降低冠脉血管阻力,并明显降低心肌耗氧量、心肌氧提取率及心肌耗氧指数。结论:人参Rb组皂苷主要通过减少左室作功,降低心肌耗氧量,增加缺血心肌供血等环节发挥抗心肌缺血作用。  相似文献   

3.
静脉注射尼群地平10μg/kg与20μg/kg,对麻醉犬降压强度相近,但大剂量组则显著改善SVI,CI、SV、CO,并明显降低TPR、TTI,与小剂量组对比,差别显著。小鼠口服LD_(50)为3.5±0.05g/kg;静脉注射84.3±26.5mg/kg;腹腔注射1.34±0.32g/kg。亚急性毒性用大白鼠给药一个月,无明显毒性反应。  相似文献   

4.
强心方对超容量负荷型心衰模型兔的治疗作用   总被引:6,自引:0,他引:6  
【目的】观察强心方对超容量负荷型心衰模型兔的治疗作用。【方法】新西兰雄性兔20只,随机分为4组:模型组、强心方组(中药组,2.6 g/kg)、西药组(20μg/kg地高辛 1 mg/kg速尿片)、中西药组(2.6 g/kg强心方 20μg/kg地高辛 1 mg/kg速尿片);复制超容量负荷型心衰模型,造模后6 h各给药组分别按设计剂量灌胃给药,连续7 d;采用四道生理仪记录并计算心率(HR)、主动脉收缩压(SBP)、主动脉舒张压(DBP)、左心室收缩压(LVSP)、左心室舒张压(LVPP)、左室内压最大上升速率( dp/dtmax)、左室内压最大下降速率(-dp/dtmax),左室内压最大变化速率(±dp/dtmax)的值,并采血检测血清超氧化物歧化酶(SOD)和丙二醛(MDA)的含量。【结果】造模后各组体质量无显著性差异,给药1周后西药组体质量显著下降(P<0.05);造模后各组心率下降(与造模前比较,P<0.05或P<0.01),给药1周后各给药组心率与模型组比较无显著性差异;给药1周后各给药组对SBP、DBP、LVDP值无明显影响,中西药组可使LVSP值升高(P<0.01);给药后各组 dp/dtmax、-dp/dtmax、±dp/dtmax值均升高(与模型组比较,P<0.05或P<0.01);模型组血清SOD水平降低,MDA水平升高(均P<0.01),各给药组均可升高SOD水平,降低MDA水平(P<0.05或P<0.01)。【结论】强心方对超容量负荷型心衰模型兔具有一定的治疗作用,与强心、利尿西药合用可减轻其副作用。  相似文献   

5.
苦豆子总碱对大鼠血流动力学的影响   总被引:1,自引:1,他引:0  
目的研究苦豆子总碱对大鼠血流动力学的影响。方法将24只SD大鼠随机分为三个剂量组(1、2和4mg/kg),静脉注射方式给药,用股动脉插管、右颈总动脉心室插管和连续记录肢体Ⅱ导联心电图的方法观察其心率(HR)、收缩压(SP)、舒张压(DP)、平均动脉血压(AP)、左心室收缩压(LVSP)、左心室舒张压(LVDP)、左心室平均压(LVAP)、左心室终末舒张压(LVEDP)、左心室内压最大上升速率(+dp/dtmax)、左心室开始收缩至dp/dtmax的间隔时间(t-dp/dtmax)、左心室内压最大下降速率(-dp/dtmax)和等容舒张时间室内压下降的时间常数(T)的变化。结果静脉注射苦豆子总碱1、2和4mg/kg后,均能使大鼠心率显著减慢(P<0.01),显著降低SP、DP、AP、LVSP和T值(P<0.01);对LVDP、LVEDP和t-dp/dtmax的影响无显著影响(P>0.05)。静脉注射苦豆子总碱2和4mg/kg能抑制左室内压最大变化速率(±dp/dtmax)和降低LVAP(P<0.05)。结论苦豆子总碱有减慢大鼠心率,降低动脉血压,抑制心肌收缩和舒张功能的作用。  相似文献   

6.
麻醉开胸犬经12指肠给予莱葛冲剂8.5、17g/kg,30~45min后可见SBP、DBP、MAP,HR,LVSP, dp/dtmax,和TPVR明显降低,约持续90~150min,而-dp/dtmax,LVEDP,CO,CI,SV,SI无明显改变。4.25g/kg对上述诸指标均无明显影响。提示莱葛冲剂对麻醉开胸犬具有明显降压作用,主要与其减慢心率,减弱心肌缩力及降低血管阻力有关。  相似文献   

7.
目的:观察不同剂量乙醇灌胃对大鼠心功能和B淋巴细胞瘤-2(Bcl-2)及Bcl-2相关X蛋白(Bax)表达的影响。方法:将SD大鼠随机分成正常对照组(正常组)、小剂量(2 g/kg·d-1)乙醇灌胃组(小剂量组)和大剂量(8 g/kg·d-1)乙醇灌胃组(大剂量组),4周后采用左心室插管结合异丙肾上腺素激动及蛋白质免疫印迹法(western blotting)实验,观察不同剂量乙醇灌胃对大鼠心率(HR)、左心室平均收缩压(mLVSP)、左心室平均舒张压(mLVDP)、左心室压最大上升速率(+dp/dtmax)、左心室压最大下降速率(-dp/dtmax)及Bcl-2/Bax表达的影响。结果:与正常组比较,大剂量组大鼠HR、mLVSP、+dp/dtmax和-dp/dtmax均显著降低,且其HR比值、+dp/dtmax比值和-dp/dtmax比值在异丙肾上腺素25 ng/kg及以上剂量也均显著降低,Bax蛋白表达量明显升高,Bcl-2蛋白表达量及Bcl-2/Bax均明显降低(均P<0.05);小剂量组大鼠心功能指标无明显变化,但其HR比值、+...  相似文献   

8.
银杏内酯对犬脑血流量的影响   总被引:8,自引:1,他引:8  
目的:观察银杏内酯对犬脑血流量的影响.方法:将麻醉犬随机分为5组,每组4只,溶剂对照组灌胃食用油(1 ml/kg),阳性药物对照组灌胃杏灵颗粒(0.22 g/kg),受试药物各剂量组灌胃银杏内酯(分别为4.86、14.6、43.7 mg/kg),给药后不同时间点分别记录颈内动脉血流量、血压、心电图、心率,并进行对照分析.结果:银杏内酯4.86、14.6、43.7 mg/kg灌胃,对麻醉犬血压、心率无显著影响;14.6及43.7 mg/kg灌胃90 min后使脑血流量显著增加,43.7 mg/kg灌胃150 min后可显著减少脑血管阻力.结论:银杏内酯可降低麻醉犬脑血管阻力,增加脑血流量,不影响心率及血压.  相似文献   

9.
[目的]观察茶多酚(tea polyphenols,TP)对麻醉大鼠血流动力学的影响。[方法]将麻醉大鼠随机分为4组:生理盐水组、低剂量组(TP 25 mg/kg)、中剂量组(TP 50 mg/kg)、高剂量组(TP100 mg/kg),用在体心脏法测定血流动力学参数LVSP、LVEDP、±dp/dtmax、CO、BP、HR。[结果]TP 25 mg/kg低剂量组静脉给药对麻醉大鼠的BP无明显影响,但可以显著提高麻醉大鼠的LVSP,±dp/dtmax,CO;TP 50、100 mg/kg中高剂量组静脉给药可明显降低麻醉大鼠BP,HR,LVSP,±dp/dtmax,CO。[结论]TP静脉给药在一定剂量范围内有降压作用,同时随着剂量的增加,心功能由强心转为抑制作用。  相似文献   

10.
木贼对大鼠心功能的影响   总被引:2,自引:0,他引:2  
目的:研究木贼对心脏功能的影响。方法:建立新式离体作功心脏模型。用上海产SJ-42型四道生理记录仪测定生理参数左室收缩压(LVSP)、左室内压上升速率最大值(dP/dtmax)、左室舒张期末压(LVEDP)、左室内压下降速率最大值(-dP/dtmax)、冠脉流量(CF)、心率(HR)和心电图(ECG)。结果:经过适当剂量木贼药液灌注后的离体作功心脏与用药前自身对照比较,LVSP、dP/dtmax、-dp/dtmax、CF增大,而HR变慢,经随机区组方差分析,均有显著差异。结论:木贼有增强心脏收缩与舒张功能,有增加冠脉流量和减慢心率的作用。  相似文献   

11.
Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P < 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (>0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P <0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P < 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.  相似文献   

12.
Objective: To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods: SD rats served as both donors and recipients. 4℃ sodium lactate Ringer's was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava (IVC) inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results: Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion: This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.  相似文献   

13.
Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P< 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P< 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.  相似文献   

14.
目的:评价使用安心颗粒对急诊经皮冠状动脉介入术(PPCI)术后生活质量的影响.方法:将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组(术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次)和对照组(仅接受基础药物治疗).所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表(MIDAS)、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果:入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异(P>0.05);出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低(P<0.05);组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低(P<0.05).两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血(P>0.05).两组发生轻度血小板减少症的患者数比较无差异(P>0.05).结论:PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.  相似文献   

15.
Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P<0.01);the MAP decreased(P<0.01)and the HR increased drastically(P<0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.  相似文献   

16.
Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.  相似文献   

17.
Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.  相似文献   

18.
A clinical guideline for the therapeutic interventions of integrative medicine may be defined as a written document which states a series of recommendations on therapeutic interventions of integrative medicine for a special disease or condition. The guideline may provide assistance to medical professionals in making clinical decisions aimed at improving the clinical outcome of patients and reducing the costs of medical care(~'4~. Recommendations issued by a guideline should be based on the best available evidence in both Western and Chinese medicine. For fulfilling this purpose, the development of clinical guidelines for therapeutic interventions in the field of integrative medicine should follow scientific principles and undergo a rigorous processes.  相似文献   

19.
Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.  相似文献   

20.
Journal of Nanjing Medical University (English Edition) JNMU, sponsored by Nanjing Medical University, was established in 1987. It is a bimonthly comprehensive English medical journal published locally and abroad.Since 2007, Journal of Nanjing Medical University (English Edition )was granted Elsevier the full publishing and distribution rights worldwide for the Electronic Edition, excluding the People's Republic of China.  相似文献   

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