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141.
JEN-YUAN KUO M.D. CHING-TAI TAI M.D. CHERN-EN CHIANG M.D. WEN-CHUNG YU M.D. YI-JEN CHEN M.D. CHIN-FENG TSAI M.D. MING-HSIUNG HSIEH M.D. CHIEN-CHENG CHEN M.D. WEI-SHIANG LIN M.D. YUNG-KUO LIN M.D. HSUAN-MING TSAO M.D. YU-AN DING M.D. MAU-SONG CHANG M.D. SHIH-ANN CHEN M.D. 《Journal of cardiovascular electrophysiology》2001,12(12):1339-1345
INTRODUCTION: Coexistence of double tachycardias in one patient has been infrequently reported. Furthermore, the mechanisms of transition between double paroxysmal supraventricular tachycardias have not been well studied. METHODS AND RESULTS: Thirty-five patients with two paroxysmal supraventricular tachycardias were studied. Group IA consisted of 3 patients with spontaneous transition between AV reciprocating tachycardia (AVRT) and AV nodal reentrant tachycardia (AVNRT). Group IB consisted of 13 patients without spontaneous transition between AVRT and AVNRT. Group IIA consisted of 5 patients with spontaneous transition between AVNRT and atrial tachycardia (AT). Group IIB consisted of 14 patients without spontaneous transition between AVNRT and AT. The absolute values of differences between the two tachycardia cycle lengths were significantly smaller in patients with than in those without transition between the two tachycardias (25+/-8 msec vs 90+/-46 msec, P < 0.05, IA vs IB; 21+/-25 msec vs 99+/-57 msec, P < 0.01, IIA vs IIB). The cutoff point of 25 msec had 80% positive predictive value for transition between the two tachycardias. Transition between two tachycardias occurred due to a spontaneous premature atrial complex (30%), conduction block at one limb of tachycardia (20%), or tachycardia-induced tachycardia (50%). Absence of transition between two tachycardias might be explained by the absence of a spontaneous premature atrial complex, longer cycle length of the first tachycardia, larger difference between two tachycardia cycle lengths, or induction of each tachycardia under different situations. CONCLUSION: Double supraventricular tachycardias with similar tachycardia cycle lengths are vulnerable to transition between different tachycardias. 相似文献
142.
JUINN-YEN KUO M.D. HAN-YU SHEN M.D. PHILIP WOLFSON M.D. DAVID A. DREILING M.D. 《The American journal of gastroenterology》1978,70(1):89-93
The administration of various dose schedules of 5-FU did not result in any alteration of pancreatic secretion. The findings would not support the thesis that the gastrointestinal side-effects of this potent cancer chemotherapeutic agent are the result of a toxic pancreatic insufficiency. 相似文献
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苍耳子的有毒成分及其药理作用 总被引:16,自引:0,他引:16
蒼耳(Xanthium strumarium L.)是菊科植物,别名野茄子、敞子、老蒼子(东北)及刺儿棵(河南)等,我国各地都有野生。蒼耳的果实名蒼耳子,是一味常用中药,內含油約39%,蒼耳甙(xanthostrumarin)1.27%,此外尚含树脂、生物碱和丙种維生素等。儿童与家畜誤食蒼耳的果实或幼苗可以中毒死亡。为了寻找蒼耳子的毒性成分,我所植物化学室侯翠英等将蒼耳子仁脫脂,制成水浸剂,并从中提出一种蛋白貭及一种黃白色結晶状具有甙类性貭的物貭(含葡萄糖及鼠李糖),后者暫名为AA_2。我們比較了蒼耳子油、蒼耳子水浸剂、蒼耳子蛋白及AA_2的毒性,并观察了AA_2的一些药理作用。 相似文献
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This study was undertaken to examine whether there is an association between parity and age at first birth and risk of ovarian cancer. The study cohort consisted of all women with a record of a first and singleton childbirth in the Birth Register between 1978 and 1984. We tracked women from the time of their first childbirth to December 31, 2003, and their vital status was ascertained by linking records with the computerized mortality database. Cox proportional hazard regression models were used to estimate the relative risks (RR) of death from ovarian cancer associated with parity and age at first birth. There were 322 ovarian cancer deaths during 27,402,995.5 person-years of follow-up. The mortality rate of ovarian cancer was 1.18 cases per 100,000 person-years. A trend of increasing risk of ovarian cancer was seen with increasing age at first birth. The adjusted RR was 0.69 (95% CI = 0.52-0.90) for women who bore two children, and 0.30 (95% CI = 0.21-0.42) for women with three or more births, respectively, when compared with women who had given birth to only one child. There was a significant decreasing trend in the adjusted RR of ovarian cancer with increasing parity. This study provides evidence that parity may confer a protective effect on the risk of ovarian cancer. 相似文献
148.
INTRODUCTIONOverthelastdecade,majoradvanceshavebenmadeinunderstandingthebiologyofmammaliantachykininneuropeptides.Itisnowwele... 相似文献
149.
目的观察肺特灵Ⅵ号对博莱霉素诱导的小鼠肺纤维化的干预作用。方法采用气管内注入博莱霉素法制备小鼠肺纤维化模型。给药28d后处死,计算肺系数;观察肺脏病理形态学改变,并对肺泡炎和肺纤维化程度进行评分;测定小鼠肺组织中超氧化物歧化酶(SOD)、丙二醛(MDA)、总抗氧化能力(T-AOC)与羟脯氨酸(HYP)等生化指标。结果与模型组相比,肺特灵Ⅵ号各剂量组可明显增加小鼠体质量,降低肺系数,减轻肺泡炎与肺纤维化程度,提高肺组织SOD活性与T-AOC,降低MDA与HYP含量(P〈0.05或〈0.01)。结论肺特灵Ⅵ号对博莱霉素诱导的小鼠肺纤维化有一定的防治作用。 相似文献
150.