槐定碱抗实验性心律失常作用

静脉注射槐定碱10mg/kg,可明显提高豚鼠对哇巴因中毒的耐受量;降低氯化钙引起的大鼠心室纤颤和死亡率;对抗氯仿-肾上腺素引起的兔心律失常及乌头碱诱发的大鼠心律失常。腹腔注射槐定碱10mg/kg,也能降低氯仿诱发的小鼠室颤率。槐定碱可使整体动物心率减慢;且可增强离体豚鼠乳头肌的收缩力,降低其兴奋性,延长不应期;并明显降低异丙肾上腺素诱发心肌的自律性。     

磷酸喹哌对实验性心律失常的作用初报

磷酸喹哌(Piperaqune phosphate,PQP)ip 18mg/kg 对氯仿诱发小白鼠室颤具有保护作用,iv PQP 9 mg/kg 明显降低氯化钙所致小鼠室颤的死亡率,iv PQP 3.36mg/kg 明显缩短肾上腺素诱发家兔心律失常的持续时间。ivPQP6.3mg/kg 显著增加恒速滴注乌头碱引起麻醉大鼠室性早搏(VE)、室性心动过速(VT),室性纤颤(VF)所需的乌头碱用量。结果提示 PQP 具有抗心律失常作用。小白鼠 iv PQP LD_(50)为93.33mg/kg。     

槐胺碱抗清醒大鼠实验性心律失常的作用

iv 乌头碱30μg/kg 可引起清醒大鼠多种心律失常。槐胺碱13.3,15mg/kgiv 可使清醒大鼠室性早搏(VP)和室速(VT)的出现延迟,并明显降低室颤(VF)的发生率,死亡时间延迟,死亡率亦降低。结果显示槐胺碱有较好的抗乌头碱诱发的心律失常作用。     

苦豆子总黄酮抗心律失常作用的实验观察

静脉注射苦豆子总黄酮50mg/kg,可显著对抗乌头碱诱发的大鼠心律失常;增加豚鼠对哇巴因的耐量;对抗氯仿—肾上腺素诱发的家兔心律失常;降低C_aCI_2,引起的大鼠室颤率和死亡率。腹腔注射50mg/kg 时,也可对抗氯仿诱发的小鼠室颤。此总黄酮也可明显减慢整体家兔和大鼠的心率,且可拮抗异丙肾上腺素的正性变率作用。     

山莨菪碱的抗实验性心律失常作用

山莨菪碱(654—2)给小鼠静注11.2,12.3,15.4,20.5和30.0mg/kg表现出抗心律失常作用,其作用强度随剂量增大而增强。能够减少CaCl_2—Ach引起的小鼠房颤(扑)的发生率;增加BaCl_2所致室性心动过速转复窦性节律的大鼠数;加大诱发小鼠室性心律失常所需乌头碱的用量。654—2 20·5mg/kg也可降低CaCl_2(120mg/kg静注)引起的大鼠室颤以及氯仿—肾上腺素所致家兔室性心律失常的发生率。     

烟浪丁的抗心律失常作用

烟浪丁(NICO)100mg/kg iv,可明显对抗乌头碱和BaCl_2诱发大鼠及氯仿-肾上腺素引起兔的心律失常;降低CaCl_2所致的大鼠室颤率;提高豚鼠心脏哇巴因中毒的耐受量。NICO 50mg/kg iv也可预防结扎火鼠左冠状动脉引起的心律失常。50～100 mg/kg ip能降低氯仿或ACl_2-CaCl_2引起的小鼠室颤率或     

甲基莲心碱对实验性心律失常的影响

甲基莲心碱能引起大白鼠心电图心率减慢,P波消失,P-R及Q-T间期延长,静脉注射甲基莲心碱10mg/kg,有对抗乌头碱诱发大鼠心律失常的作用,推迟哇巴因所致豚鼠室颤和心脏停博的出现时间及提高哇巴因的用量。甲基莲心碱5mg/kg,能缩短氯仿-肾上腺素诱发家兔心律失常的持续时间。     

苄基四氢巴马汀抗实验性心律失常的作用

苄基四氢马汀(B-THP)1mg/kg有对抗氯仿所致的小鼠室颤作用,5mg/kg可使哇巴因引起的豚鼠心律失常量和致死量增加。并有减轻氯仿-肾上腺素所致的心律失常作用,在麻醉大鼠,ivB-THP10mg/Kg可明显降低氯化钙所致的室颤发生率和死亡率,但对乌头碱引起的大鼠心律失常无拮抗作用。麻醉大鼠的心电图结果表明,B-THP静脉恒速灌注有减慢大鼠心率、延长Q-T间期的作用。iv3mg/kg B-THF在抗哇巴因引起的心律失常时对其血流动力学变化无明显影响。     

左旋荷包牡丹碱抗实验性心律失常的研究

为了研究L－D,即左旋荷包牡丹碱抗心律常的作用。用运行心律失常的实验模型研究L－D对BaCl2,CaCl2,肾上腺素、氯仿、乌头碱、哇巴因诱发的心律失常的影响,结果：左旋荷包牡丹碱静脉注射10mg/kg能使BaCl2所致的大鼠心律失常迅速转为窦性节律,可明显提高乌头碱引起大鼠室颤和死亡的用量;降低CaCl2所致大鼠和氯仿所致的小鼠的室颤发生率和死亡率;对肾上腺素、哇巴因诱发的心律失常有明显的对抗效应;对电刺激下丘脑引起的心律失常有显著的保护效应。结果表明：左旋荷包牡丹碱具有抗心律失常的作用。     

烟浪丁的抗心律失常作用

静脉注射18mg/kg烟浪丁可预防BaCl_2所致的大鼠心律失常,使乌头碱诱发室性早搏,室性心动过速和心室颤动时所需的剂量增加。豚鼠静脉注射9mg/kg可使哇巴因产生室性早搏和心脏停搏时剂量增加,家兔静脉注射4mg/kg可预防肾上腺素及氯仿一肾上腺素所致的心律失常,但不提高兔电室颤阈值。     

Value of D-Dimers in patients with acute aortic dissection

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.     

Research of combined liver-kidney transplantation model in rats

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.     

BLOOD PRESSURE CHANGE WITH AGE IN SALT-SENSITIVE TEENAGERS

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.     

安心颗粒对急诊经皮冠状动脉介入术后生活质量影响的研究

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.     

The comparative studies of the influences of Urapidil and Nicardipine on sino-atrial node function, atrio-ventricular node function and hemodynamics

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.     

Expression of OPGmRNA and ODFmRNA in the patients of hip fracture due to osteoporosis

Objective：To investigate the gene expression of osteoprotegerin（OPG） and osteoclast differentiation factor（ODF） in the bone tissue of patients with hip fracture due to osteoporosis. Methods：OPGmRNA and ODFmRNA in the bone tissue in 50 cases of osteoporosis sufferers（over 50 years old） with hip fracture（Observer Group） and 30 cases of hip facture sufferers with no osteoporosis（Control group） were analyzed with the Semi-Quantitative RT-PCR method. Results：The mRNA expressed of ODF, OPG were both high in the patients with hip fracture. In the control group, the expression of OPG mRNA was observed, while the expression of ODF mRNA was very slight. Conclusion：Aged patients contained all signals including OPG, ODF that are essential for inducing osteoclastogenesis and promoting bone resorption.     

The clinicopathological and immuohistochemical analysis of solid-pseudopapillary tumor of the pancreas： report of 9 cases

Objective：To investigate the clinical features, pathological characteristics and immunophenotype of solid-pseudopapillary tumor of the pancreas（SPTP）. Methods：Nine surgically treated cases of SPTP were retrospectively reviewed. Hematoxylin and Eosin（HE） staining and immunohistochemical staining were used to analyze all cases, and the general clinical data was collected. Results：Six patients were asymptomatic except for a palpable mass. Two patients complained of vague-epigastric pain. One patient appeared jaundice. The tumor was encapsulated and solid tissues alternately with cystic tissues. Histologically, the histological structure of solid portion was pseudopapillary with a fibrovascular core. Tumor cells were uniform and medium-sized which were arranged in sheets ets or nests or pseudopapillary patterns. Immunohistochemical studies demonstrated that SPTP proved positive in vimentin（9/9 cases）, AAT（9/9 cases）, NSE（9/9 cases）, ACT（7/9 cases）, CK20（2/9 cases）, CgA（1/9 cases）, S-100（3/gcases）, PR（4/gcases）, Syn（3/9 cases） and CD56（5/9cases）, negative in CEA and ER. Conclusion：SPTP is a tumor predominantly occurring in young women frequently without special symptoms. This tumor has various characteristical histological patterns with different immunophenotype.     

Dynamic Changes in Serum Estradiol and Progesterone levels in Patients of Premenstrual Syndrome with Adverse Flow of Liver-qi

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.     

Real-time Three-dimensional Echocardiography in Assessment of Left Ventricular and Right Ventricular Volumes

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.     

SCREENING FOR A 21-CHROMOSOME ABNORMALITY IN PREIMPLANTED EMBRYOS OF ELDERLY WOMEN

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.