不同体力活动水平高校女性教师递增负荷运动前后血清心肌酶的比较研究

目的：研究不同体力活动水平女性教师递增负荷前后血清心肌酶的差异,进而评估不同体力活动水平女性教师运动中可能出现的心脏风险。方法：对受试者进行体力活动问卷调查,从中筛选87名健康女性教师进行递增负荷试验,测试运动测试前后的心肌酶指标进行比较分析。结果：1）运动前安静状态下,体力活动不足组心肌酶各指标值均低于中、高水平体力活动组,其中体力活动不足组CK-MB显著的低于中等组（P<0.05）并且非常显著的低于高等组（P<0.01）。2）运动测试后,体力活动高水平组CK值显著的高于体力活动不足组（P<0.05）,除AST以外,其余心肌酶水平随着体力活动水平的升高而升高。其中体力活动不足组AST值超过正常值范围,提示心肌组织出现了一定的损伤。3）除中等和高水平体力活动组的CK-MB运动后比运动前有所下降外,其余各组指标运动后都有所升高,特别是三组的CK、AST都非常显著的升高（P<0.01）,从运动前后差值比较分析来看,不足组的CK、AST增加值显著的高于中等组和高等组（P<0.05）。结论：1. 体力活动不足的高校女性教师安静状态下的心肌酶水平较低。2. 递增负荷运动会引起高校女性教师心肌细胞出现一定程度的损伤,运动后血清心肌酶水平有所升高,而且体力活动不足女性的损伤更为严重,主要表现在心肌酶指标中的CK和AST。     

生脉注射液对大鼠实验性心肌梗死的保护作用

采用大鼠结扎左冠状动脉前降支制备急性心肌梗死模型,观察生脉注射液对实验性心肌梗死的保护作用。结果表明,生脉注射液中、大剂量组可使急性心肌梗死24小时大鼠的心肌梗死面积明显缩小,血清AST、LDH、CK活性及MDA含量明显降低,SOD及GSH-Px活性明显升高,血液粘度及血浆粘度明显下降。表明生脉注射液对大鼠实验性心肌梗死具有明显保护作用,可能与其增强抗氧化酶活性,减少自由基对心肌的氧化损伤以及降低血液粘度等机制有关。     

心痛泰颗粒对大鼠抗急性心肌缺血保护作用的实验研究

目的 探讨心痛泰颗粒对大鼠抗急性心肌缺血的保护作用的研究。方法 将大鼠随机分成6组,除假手术组10只外,余大鼠予以结扎大鼠冠状动脉左前降支造成大鼠急性心肌缺血损伤模型,成模大鼠随机分为模型组、心痛泰高、中、低剂量组及麝香保心丸组。分别给以蒸馏水、心痛泰低、中、高剂量及麝香保心丸进行灌胃2周后,观察3个时间点模型动物心电图S-T段变化;采用ELISA法检测血清肌酸激酶(CK)、乳酸脱氢酶(LDH)、丙二醛(MDA)和超氧化物歧化酶(SOD)含量;采用TTC染色测定心肌梗死面积;采用HE染色法观察心肌坏死组织病理变化。结果 与假手术组比较,模型组大鼠心电图S-T段抬高明显（P<0.01）提示模型复制成功,模型组血清CK、LDH和MDA的浓度明显升高（P<0.01）,血清SOD浓度明显降低（P<0.01）;与模型组比较,各给药组有拮抗大鼠急性心肌缺血心电图S-T段抬高的作用（P<0.05）,且能明显降低血清CK、LDH活性和MDA浓度,升高血清SOD活性(P<0.01),明显缩小心肌梗死范围,保护心肌组织（P<0.01）。结论 心痛泰颗粒抗急性心肌缺血心肌损伤的效果显著,对急性心肌缺血损伤大鼠有明显的保护作用。     

糖尿病并发急性心肌梗塞的临床研究

对１７例糖尿病并发急性心肌梗塞１７例非糖尿病的急性心肌塞患者作了配对比较研究。结果表明：糖尿病患者的无痛型心梗发生较多，心室晚电位检出阳性率明显和蔼同，超声心动图测定左室功能受损严重。提示糖尿病并发急性心肌梗塞有其临床特殊性，并作了讨论。     

High-magnesium exposure to bullfrog heart causes ST segment elevation

Hypermagnesemia occurs in elderly people or patients with renal insufficiency after excessive ingestion of magnesium-containing laxatives. In addition to typical electrocardiogram (ECG) findings caused by conduction defects, changes in the ST segments and T waves are also observed in patients with severe hypermagnesemia. This suggested the involvement of similar pathophysiology to acute myocardial infarction, as we previously demonstrated using burn-induced subepicardial injury model in frog hearts. In the present study, by exposing the bullfrog heart to high-magnesium solution, we reproduced prominent ST segment changes in ECG as actually observed in patients with severe hypermagnesemia. In addition to the great increase in the T waves, the ECG showed a marked elevation of the ST segments and the cardiac action potential demonstrated a marked shift of the resting membrane potential to the depolarized side. High-magnesium exposure did not affect the abundance of Na⁺/K⁺-ATPase proteins. However, the pharmacological stimulation of Na⁺/K⁺-ATPase activity by insulin quickly retrieved the elevated ST segments in ECG. From these results, the functional blockade of Na⁺/K⁺-ATPase activity by magnesium ions was thought to be responsible for generating the potassium concentration gradient and the subsequent ST segment changes.     

Toxicity of halogenated oxyquinolines in dogs. A clinical study. II. History, symptoms, laboratory findings, therapy, and follow-up

Intoxication due to short-term oxyquinoline therapy was studied in 100 dogs, which had been so treated because of diarrhoea (except in 2 cases). The latter condition was in itself mild and uncomplicated. The main symptoms of intoxication were listlessness or excitation and nervousness, aggressiveness, tremor, convulsions, and salivation. Clinical examination revealed myocarditis and liver injury. Mortality, i.e. the sum of spontaneous deaths and euthanasia, amounted to 30 %. The treatment considered to be most important was sedation and anticonvulsant measures. It was further essential to correct the dehydration, which was often present. A follow-up investigation showed that approx. 1/3 of the dogs which had recovered from the acute intoxication developed recurrent convulsions within the next 3 years.     

93例心脏直视手术转流的体会

本文总结了我院各种心内直视手术93例。介绍体外循环中的管理,并探讨了血液稀释的应用以及保持高流量灌注,维持灌注压,加强心肌保护的重要性。     

Rho激酶抑制剂治疗急性心肌梗死血清炎症因子的变化及疗效观察

目的给予急性心肌梗死患者早期应用Rho激酶抑制剂,测查其血清炎症因子IL-6,TNF-a,NO的变化情况,并以此为依据,观察Rho激酶抑制剂临床治疗效果.方法选择同期收治的未接受冠脉介入治疗的急性心肌梗死患者50例.随机分为治疗组和常规组,各25例.两组均给予硝酸甘油、硫酸氢氯吡格雷、辛伐他丁等常规治疗.治疗组在常规治疗的基础上静脉滴注盐酸法舒地尔30 mg,2次/d,10 d为1个疗程,观察患者血清炎症因子IL-6,TNF-a,NO浓度变化.结果加用法舒地尔的治疗组患者血清炎症因子IL-6,TNF-a浓度下降,NO浓度增高,均比常规组明显,且患者心功能检测治疗组改善更明显.结论 Rho激酶抑制剂治疗急性心肌梗死能够更有效地保护心肌细胞,降低炎症因子对心肌细胞的损伤,对改善患者心功能有显著效果.