Potassium variability during hospitalization and outcomes after discharge in patients with acute myocardial infarction

BACKGROUND The variability of metabolic biomarkers has been determined to provide incremental prognosis information,but the implications of electrolyte variability remained unclear.METHODS We investigate the relationships between electrolyte fluctuation and outcomes in survivors of acute myocardial infarction(n=4386).Ion variability was calculated as the coefficient of variation,standard deviation,variability independent of the mean(VIM)and range.Hazard ratios(HR)were estimated using the multivariable-adjusted Cox proportional regression method.RESULTS During a median follow-up of 12 months,161(3.7%)patients died,and heart failure occurred in 550(12.5%)participants after discharge,respectively.Compared with the bottom quartile,the highest quartile potassium VIM was associated with increased risks of all-cause mortality(HR=2.35,95%CI:1.36–4.06)and heart failure(HR=1.32,95%CI:1.01–1.72)independent of cardiac troponin I(c Tn I),N terminal pro B type natriuretic peptide(NT-pro BNP),infarction site,mean potassium and other traditional factors,while those associations across sodium VIM quartiles were insignificant.Similar trend remains across the strata of variability by other three indices.These associations were consistent after excluding patients with any extreme electrolyte value and diuretic use.CONCLUSIONS Higher potassium variability but not sodium variability was associated with adverse outcomes post-infarction.Our findings highlight that potassium variability remains a robust risk factor for mortality regardless of clinical dysnatraemia and dyskalaemia.

Surgical Management for a Broken Delivery Shaft in <i>Vivo</i>during PCI Following Acute Myocardial Infarction in a Complex LAD Artery Lesion: A Case Report and Literature Review

Stuck up and fracture of coronary angioplasty hardware are unwonted complications of percutaneous coronary interventions (PCI) for which surgical retrieval and management is once in a while required. We present one case of a 59-year-old diabetic, a hypertensive gentleman who attended the emergency room (ER) with central chest pain for 2 hours. After evaluation of the patient by physical and noninvasive diagnostic tests, he was diagnosed as a case of acute myocardial infarction (AMI) with stable hemodynamic. For the aforementioned findings, the patient was treated first with a thrombolytic agent in ER and then shifted to Cardiology Department for monitoring and further coronary evaluation by coronary angiography (CAG). CAG revealed essentially single vessel disease (SVD) with complex left anterior descending (LAD) artery lesion, so PCI was attempted but failed with an unfortunate incidence of the broken delivery shaft and left in vivo. Immediate decision making and surgical management for retrieval of lost angioplasty device and correction coronary lesion with revascularization save the patient from grave complication. All the series of events and management approaches of this very complex coronary artery lesion are discussed in this article.

When is The Best Time of Stem Cell Transplantation for Treating Acute Myocardial Infarction──A Brief Meta-analysis of Current Clinic Trials

The best time of stem cells transplantation for treating acute myocardial infarction (AMI) is still to be followed with interest and a focus issue for clinical cardiologist. A brief meta-analysis of clinical trials about timing-window and therapeutic effects of stem cell transplantation for treating AMI will be made out in this article.

The Safety of Autologous Peripheral Blood Stem Cell Transplantation by Intracoronory Infusion in Patients with Acute Myocardial Infarction

Objectives Bone-marrow stem-cell transplantation has been shown to improve cardiac function in patients with acute myocardial infarction (AMI) , but the safety of intracoronory infusion of autologous peripheral blood stem-cell (PBSCs) in patients with AMI is unknown. For this reason, we observe the feasibility and safety of PBSCs transplantation by intracoronory infusion in such patients. Methods 41 patients with AMI were allocated to receive granulocyte colony-stimulating factor (G- CSF: Filgrastim,300μg) with the dose of 300μg~ 600μg/day to mobilize the stem cell, and the duration of applying G-CSF was 5 days. On the sixth day, PBSCs were separated by Baxter CS 3000 blood cel 1 separator into suspend liquid 57 ml. Then the suspend liquid was infused into the infarct related artery (IRA) by occluding the over the wire balloon and infusing artery through balloon center lumen. In the process of the intracoronary infusion of PBSCs, the complications should be observed, which were arrhythmias including of bradycardia, sinus arrest or atrial ventricular block, premature ve. ntricular beats ,ven~icular tachycardia, ventricular fibrillation; and hypotention, etc. Results There were total 10 cases with complications during the intracoronary infusion of PBSCs. The incidence of complications was 24.4% (10/41), including bradyca- rdia was 2.4 % (1/41), sinus arrest or atrial ventri- cular block was 4.0% (2/41), ventricular fibrillation was 2.4 % (1/41), hypotention was 14.6 % (6/41). Conclusions In patients with AMI, intracoronary infusion of PBSCs is feasible and safe.

Effect of a distal protection device on epicardial blood flow and myocardial perfusion in primary percutaneous coronary intervention

Objective: The beneficial effect of percutaneous coronary intervention (PCI) in patients with acute myocardial infarction (AMI) has been well established, but there is the problem of no-reflow phenomenon which is an adverse prognostic factor in primary PCI. In the present study the effect of a distal protection device (PercuSurge GuardWire; GW) on epicardial blood flow and myocardial perfusion was evaluated. Methods and Results: Patients with AMI were randomly divided into 2 groups, the GW and the control groups. The GW group included 52 patients with AMI who underwent primary PCI with GW protection and the control group included 60 patients who underwent primary PCI without GW protection. Epicardial blood flow in the infarct-related artery (IRA) and myocardial perfusion were evaluated according to the thrombolysis in myocardial infarction (TIMI) flow grade and the myocardial blush grade (MBG). We found TIMI score of 3 was obtained significantly more frequently in the GW group (96%) than in the control group (80%). The MBG score of 3 was obtained also significantly greater in the GW group (65%) than in the control group (33%). Conclusion: Primary PCI with GW protection can significantly improve epicardial blood flow and myocardial perfusion.

THE EFFECT OF LOW DOSE ASPIRIN ON THE PLATELET FUNCTION IN PATIENTS WITH ACUTE MYOCARDIAL INFARCTION (AMI)

To assess the optimal dose of aspirin （ASA） in the treatment of AMI, 60 cases of AMI: 1. admitted within 24 hours after onset of illness, 2. ASA not used within one week before, 3. any other drugs influencing the platelet function also not used during the course of study, were randomized into two groups, 30 cases each: one with conventional therapy as control, the other combined with daily oral ASA 100mg. They were matched in sex, age, infarct site and coexistent conditions （hypertension, diabetes mellitus, hyperlipemia, smoking etc.）. The second group was further divided into subgroup I with serum peak CK<1000 U/L and subgroup Ⅱ with serum peak CK>1000 U/L. The parameters of platelet function including plasma TXB/6-keto-PGF, platelet aggregation induced by 5-HT and epinephrine were studied on different days for 3 weeks. Twenty healthy persons were selected for normal value of platelet function.

Risk of cardiac rupture after acute myocardial infarction is related to a risk of hemorrhage

Although cardiac rupture (CR) is a fatal mechanical complication of acute myocardial infarction (AMI), to date no predictive model for CR has been described. CR has common pathological characteristics with major bleeding. We aimed to investigate the relationship between the risk factors of major bleeding and CR. A total of 10 202 consecutive AMI patients were recruited, and mechanical complications occurred in 72 patients. AMI patients without CR were chosen as control group. Clinical characteristics including bleeding-related factors were compared between the groups. The incidences of free wall rupture (FWR), ventricular septal rupture (VSR), and papillary muscle rupture (PMR) were 0.39%, 0.21%, and 0.09%, respectively, and the hospital mortalities were 92.5%, 45.5%, and 10.0%, respectively. Female proportion and average age were significantly higher in the groups of FWR and VSR than in the control group (P<0.01); higher white blood cell count and lower hemoglobin were found in all CR groups (P<0.01). Compared to the control group, patients with CR were more likely to receive an administration of thrombolysis [26.39% vs. 13.19%, P<0.05], and were less likely to be treated with primary percutaneous coronary intervention (PCI) [41.67% vs. 81.60%, P<0.05]. The major bleeding scores (integer scores) of FWR, VSR, and PMR were (17.70±7.24), (21.91±8.33), and (18.60±7.88), respectively, and were significantly higher than that of the control group (11.72±7.71) (P<0.05). A regression analysis identified age, increased heart rate, anemia, higher white blood cell count, and thrombolysis as independent risk factors of CR, most of which were major bleeding-related factors. The patients with CR have a significantly higher risk of hemorrhage compared to the group without CR. Risk of CR after AMI is related to the risk of hemorrhage.

Val279Phe variant of Lp-PLA2 is a risk factor for a subpopulation of Indonesia patients with acute myocardial infarction

Lipoprotein-associated phospholipase A2(Lp-PLA2),a member of the phospholipase A2 superfamily,is an enzyme that hydrolyses phospholipids,is found in blood circulation as a sign of inflammation,and takes a role in atherogenesis.There is an epidemiologic relation between increased Lp-PLA2 levels and coronary heart disease.Lp-PLA2 is an enzyme that is produced by macrophages and takes a role as an independent predictor of a coronary event.A genetic variant of Val279Phe on the Lp-PLA2 gene has been reported with various results in Japan,China,Korea,and Caucasian populations.This study aims to analyse the influence of the Val279Phe genetic variant on acute myocardial infarction(AMI)at Saiful Anwar Hospital,Indonesia.This study was conducted on 151 patients(111 AMI patients and 40 non-AMI patients).The genetic variant of Val279Phe was identified through a genotyping method.There were no significant differences in age,total cholesterol level,LDL-C(low-density lipoprotein cholesterol)level,and family history data between AMI and non-AMI patients.However,AMI patients had low HDL-C(high-density lipoprotein cholesterol),triglyceride levels,dyslipidaemia,and hypertension risk factors compared to non-AMI patients.The frequency of the GG genotype(279Val)was dominant in both AMI and non-AMI groups.Further analysis suggested that the GG genotype has a 2.9 times greater risk of AMI compared to the GT/TT genotype(279Phe).This study concluded that the Val279Phe genetic variant undoubtedly influenced AMI risk,which is a warrant for further development of early detection and improving strategy to prevent AMI in patients.

Renal insufficiency is an independent predictor of in-hospital mortality for patients with acute myocardial infarction receiving primary percutaneous coronary intervention

Objective:To investigate the relationship between renal function and clinical outcomes among patients with acute ST-segment elevation myocardial infarction (ASTEMI), who were treated with emergency percutaneous coronary intervention (PCI). Methods: 420 patients hospitalized in Peking University First Hospital, diagnosed with ASTEMI treated with emergency (PCI) from January 2001 to June 2011 were enrolled in this study. Estimated glomerular filtration rate (eGFR) was used as a measure of renal function. We compared the clinical parameters and outcomes between ASTEMI patients combined renal insufficiency and the patients with normal renal function. Results:There was a significant increase in the concentrations of fibrinogen and D-Dimer (P<0.05) and a much higher morbidity of diabetes mellitus in the group of patients with chronic kidney disease (CKD; eGFR<60 ml/(min·1.73 m2)) (P<0.01). CKD (eGFR<60 ml/(min·1.73 m2)) was an independent predictor of in-hospital mortality for patients hospitalized with ASTEMI receiving PCI therapy rapidly (P=0.032, odds ratio (OR) 4.159, 95% confidence interval (CI) 1.127-15.346). Conclusions:Renal insufficiency is an independent predictor of in-hospital mortality for patients hospitalized with ASTEMI treated with primary PCI.

ALTERATIONS OF THE PERCENTAGE OF LYMPHOCYTES IN PATIENTS WITH ACUTE MYOCARDIAL INFARCTION AND CLINICAL EVALUATION

In order to investigate the human immunological response to acute myocardial infarction (AMI), lymphocyte cells of peripheral vein blood withdrawn from patients with AMI were continuously and quantitatively assayed by flow cytometry method (FCM). The correlation between the alterations of immunological function and clinical course was analyzed. MATERIAL AND METHODS Thirty-one samples were collected from peripheral vein blood of hospitalized patients with AMI in the author’s institution. The patients were aged from 39 to 81 years, ( 26 men and 5 women ). Samples withdrawn from 14 healthy adults served as normal control.

EVALUATION OF SERUM TROPONIN T MEASUREMENTIN ACUTE MYOCARDIAL INFARCTION

The release kinetics of the cardiac specific troponin T (cTnT), measured by an immunosorbent assay, in 32 patients with acute myocardial infarction (AMI) was evaluated. In 8 AMI patients (25%), the release kinetics of serum cTnT showed biphasic serum concentration curves with a large peak at 10 to 18 hours after onset and the serum cTnT concentrations were up to 30 to 120 times of the normal upper limit-detected (0.2 μg / ml), and another samll cTnT peak at 70 to 100 hours after onset of pain. The serum cTnT measurements in the remaining 24 AMI patients (75%) gave only one large peak which was around 32 to 108 hours after onset of pain. cTnT appeared in serum as early as 3 to 4 hours and remained elevated until 240 hours after the infarctions. The results indicated that (1) cTnT was a sensitive and specific marker of AMI; (2) the biphasic curve of cTnT releae in general, the ratio of cTnT at around 14 to 32 (14/32)>1 in particular, may be a useful marker suggesting early reperfusion; (3) the continuous elevation of serum cTnT in AMI course might be a prognostic indicator for unfavorable outcomes.

51例急性心肌梗死(AMI)合并心脏破裂(CR)的临床特征及预后

目的分析急性心肌梗死(acute myocardial infarction,AMI)后心脏破裂(cardiac rupture,CR)的临床特征、发病危险因素和预后因素。方法回顾性分析2004年1月至2014年1月我科收治并确诊为AMI合并CR的51例患者的住院资料,以及204例对照组AMI患者的资料。结果 CR组死亡34例(67%),平均胸痛到死亡时间为17.4天。CR组行急诊经皮冠状动脉介入治疗(percutaneous coronary intervention,PCI)术22例(43%),其中死亡11例(50%);保守药物治疗21例(41%),其中死亡20例(95.2%);择期外科搭桥8例(15.7%),其中死亡3例(37.5%)。行外科修补术11例,其中死亡4例。CR组平均年龄、女性及高血压占比、NT-proBNP、肌酐、血糖、心率均显著高于对照组,左室射血分数、血红蛋白、红细胞压积水平均显著低于对照组(P<0.05)。CR组β-blocker、ACEI/ARB和欣维宁的使用比例均低于对照组(P<0.05),低分子肝素和机械通气使用率显著高于对照组(P<0.05)。结论本研究发现AMI合并CR患者死亡率极高,高龄、快心室率、高血压、贫血、低红细胞压积是AMI患者急性期出现CR的独立危险因素。女性、左室游离壁破裂、左室射血分数低、NT-proBNP水平高、高血糖、肾功能不全与CR患者近期死亡(60天内)显著相关,是AMI合并CR患者近期死亡的独立危险因素。

冠状动脉左主干(LMCA)完全闭塞致急性心肌梗死(AMI) 25例临床分析

目的探讨冠状动脉左主干(left main coronary artery,LMCA)急性完全闭塞(100%)导致急性心肌梗死(acute myocardial infarction,AMI),患者的临床特点、治疗方法和近期死亡危险因素。方法回顾性分析2002年8月至2014年1月于我院因心肌梗死行急诊冠脉造影证实LMCA急性完全闭塞患者的住院资料,并按住院期间是否死亡分为死亡组和生存组,比较两组患者临床特点和治疗方法的差异性。电话随访生存组患者心血管事件发生情况。结果 2 214例急诊冠脉造影患者中LMCA急性完全闭塞25例(1.13%),其中入院时出现心源性休克13例(52%),严重室性心律失常8例(32%),成功施行经皮冠状动脉介入术(percutaneous coronary intervention,PCI)19例(76%),住院期间死亡8例(32%)。住院死亡组患者的心源性休克(100%)、急性肺水肿(100%)、严重室性心律失常(63%)、术中心肺复苏(50%)、术后心功能衰竭(50%)的发生率均显著高于生存组,死亡组患者入院时血压(81/50 mmHg)显著低于生存组。心源性休克是住院死亡的独立危险因素(OR=17.32)。结论 LMCA急性完全闭塞患者死亡率极高,入院时心源性休克、术中心肺复苏、术后心功能衰竭提示预后不良。成功的PCI可能可以挽救部分患者生命。

瑞舒伐他汀联合参麦注射液治疗AMI患者临床疗效及对血清YKL-40NF—κB水平和免疫功能的影响

目的探讨瑞舒伐他汀联合参麦注射液治疗急性心肌梗死（AMI）的临床疗效及对血清甲壳质酶蛋白40（YKL-40）、核因子-κB（NF—κB）水平，以及免疫功能的影响。方法按照随机数字表法将168例AMI患者分为瑞舒伐他汀组、参麦注射液组、联合组和对照组（每组各42例）。对照组给予常规综合治疗，瑞舒伐他汀组在对照组基础上给予瑞舒伐他汀钙片治疗，参麦注射液组在对照组基础上给予参麦注射液治疗，联合组在对照组基础上给予瑞舒伐他汀钙片＋参麦注射液治疗，比较各组治疗效果及相关指标变化情况。结果联合组患者疗程结束时总有效率明显高于对照组、参麦注射液组和瑞舒伐他汀组（P〈0．05）；联合组患者血清YKL-40、NF—κB、白细胞介素-6（IL-6）、高敏C-反应蛋白（hs—CRP）、肌酸激酶同工酶（CK—MB）、基质金属蛋白酶-9（MMP-9）、肌钙蛋白T（cTnT）水平均明显低于对照组、参麦注射液组和瑞舒伐他汀组（P〈0．05）。结论瑞舒伐他汀联合参麦注射液治疗AMI临床效果明显，可有效地改善YKL-40、NF—κB和炎症因子水平，调节免疫功能，减轻心肌损伤，推广价值较高。

25岁以下年轻人初发急性心肌梗死的临床特点及长期预后分析

目的 探讨25岁以下年轻人初发急性心肌梗死(AMI)的临床特征及长期预后分析。方法 对2013年2月至2023年7月就诊西安交通大学第一附属医院的25岁以下年轻人初发AMI患者(年轻组)的临床资料进行分析,同时选取同时间段就诊的年龄25~44岁性别相同且发病部位相同的中青年AMI患者(中青年组)作为对照组(1∶2入组),比较两组患者的合并症、高危因素及生化指标等临床特征及预后。结果 共纳入84例患者,其中年轻组28例,中青年组56例。年轻组患者中以单支病变(15/26,57.7%)或未见明显罪犯血管(7/26,26.9%)为主,白细胞计数及尿酸水平明显高于中青年组。中位随访时间72.4(25.5,110.2)个月。Cox回归模型分析,年轻组(HR=7.925,95%CI:1.861~33.749,P=0.005)、住院时长(HR=1.183,95%CI:1.001~1.398,P=0.048)及合并典型心绞痛症状(HR=0.090,95%CI:0.015~0.544,P=0.009)是影响总生存期的独立影响因素。结论 相对于中青年AMI患者,年轻组AMI患者预后更差。年轻AMI患者(25岁以下)、住院时长及合并不典型心绞痛症状是影响该人群AMI患者的主要危险因素。因此,早期发现及识别年轻患者发生AMI有助于改善患者预后。

基于急救护理质量构建急性心肌梗死患者急救流程护理方案及其急救效果初探

目的 研究基于急救护理质量构建急性心肌梗死患者急救流程护理方案及其急救效果。方法 本研究以2020年1月—2021年12月在新疆医科大学第一附属医院进行治疗的急诊心肌梗死患者150例作为研究对象,新疆医科大学第一附属医院于2021年开展基于流程优化构建急救护理环节管理,其中2020年(对照组)以及2021年(观察组)各入选75例,比较两组患者的抢救情况、心功能指标、不良心脑血管事件发生情况、护理服务能力、护理满意度进行比较。结果 观察组患者的抢救成功率(χ^(2)=5.372,P=0.020)显著高于对照组,急诊停留时间(t=5.264,P=0.000)、完成首份心电图时间(t=16.583,P=0.000)、完成肌钙蛋白检查时间(t=17.881,P=0.000)、住院时间(t=4.849,P=0.000)显著低于对照组,观察组患者治疗后10天、3个月以及6个月的LVEF、LVED显著优于对照组(P<0.05);观察组患者的治疗后6个月内发生心肌梗死复发、靶血管血运重建、心力衰竭发生率显著低于对照组;观察组对于护理人员专业知识评分(t=14.375,P=0.000)、快速反应能力评分(t=4.300,P=0.000)、医护配合评分(t=10.171,P=0.000)显著高于对照组,观察组患者的护理满意度显著高于对照组(P<0.05)。结论 基于本院实际情况的护理质量评价体系的构建,对于急性心肌梗死患者急救效果的提升具有积极的意义,建议临床推广。

电针内关穴对AMI大鼠自主神经与中枢P物质、一氧化氮合酶的影响

目的:探讨电针大鼠内关穴抗急性心肌缺血(AMI)损伤的自主神经效应路径和可能的有效物质。方法:SD大鼠随机分为正常组(A组)、模型对照组(B组)、电针内关组(C组),每组6只。各组分离颈部右侧迷走神经、左侧交感神经,BL-420E+生理仪记录放电情况。B、C组Pit股静脉注射制作AMI模型,C组造模后5min电针左侧内关穴治疗。最后免疫组化ABC法、NADPH-黄递酶组化法分别检测各组大鼠下丘脑室旁核(PVN)、延髓迷走神经复合区及脊髓(C8-T2)外侧角的P物质(SP)和一氧化氮合酶(NOS)的表达。观测各组大鼠心交感神经、迷走神经放电频率变化以及治疗前后自主神经SP、NOS灰度值。结果:造模前A、B、C组迷走神经放电频率分别为(5.12±0.67)、(5.13±0.36)、(5.05±0.47)次/min,交感神经放电频率分别为(23.21±3.23)、(22.84±2.18)、(23.04±4.32)次/min,组间比较均无差异;造模后0min时B、C组迷走神经放电频率增加、交感神经放电频率减少,与A组比较有显著差异(P<0.05);造模后20minC组迷走神经和交感神经放电频率恢复明显,与A组比较均无差异,与B组比较均有差异(P<0.05)。A组PVN、延髓迷走神经复合区、脊髓(C8-T2)外侧角的SP灰度值分别为(115.44±12.20)、(84.64±14.50)、(43.32±12.14),NOS灰度值分别为(98.03±14.72)、(64.60±12.33)、(40.33±10.42),B组各部位SP灰度值小于A组,组间有差异性(P<0.05),C组各部位SP灰度值均高于A、B组,组间比较有差异性(P<0.05);B组各部位NOS灰度值增加(P<0.05),C与A组各部位NOS灰度值无明显差异。结论:电针内关穴对AMI大鼠的保护效应与自主神经及中枢SP、NOS的协调作用密切相关。

Effect of distal protection device on prognosis of acute myocardial infarction combined with emergency percutaneous coronary intervention

The no-reflow and slow blood flow in the process of PCI treatment may reduce its effectiveness and lead to expansion of infarct in size sometimes. Also the application of thrombolytic agent inside of coronary artery,platelet inhibitors GP Ⅱ/Ⅲ or direct thrombectomy can＇t improve short or long-term clinical outcomes, So we evaluated the safety and efficacy of distal protection device （GuardWire PlusTM） in the acute myocardial in farction （AMI） combined with percutaneous coronary intervention （PCI）. Method Seventy-two patients with acute myocardial infarction receiving emergency PCI were randomly assigned into the distal protection group （GW group） and non-distal protection group（NGW） group. Data analyzed between the two groups were included the clinical characteristics, angiographic results, ST segment resolution, postoperative TIMI flow grade, TIMI frame count, myocardial blush grade, the left ventricular ejection fraction （LVEF） by eehocardiography in a Week after or 3 months after PCI, myocardial enzymes,preoperative and postoperative neuroendoerine biomarkers： endothelin （ET）, plasma renin activity （PRA）, angiotensin Ⅱ （AII）, aldosterone（ALD）, norepinephrine（NE）, epinephrine （E）. Results ST segment resolution ≥ 50% was significantly higher in the GW group （68.4%） than in NGW group （41.2%, P 〈 0.05）. Early peak CK-MB and CTNI in GW group versus NGW group （8.63 ±2.42 hours vs 11.18 ±2.26 hours,10.16 ±2.96 hours vs 12.35 ±2.06 hours）, and peak reduction difference were observed （63.3 ±9.82 vs 74.28 ＋ 6.15 P = 0.000, 18.01 ＋ 7.21 vs 21.48 ±5.61 P = 0.027）. Left ventricular ejection fraction （LVEF） was higher in GW group （P = 0.01） than in NGW group. TIMI grade exhibited no difference while TIMI frame count （P = 0.043） and myocardial blush grade were significantly different （P = 0.0001）. Postoperative biomarkers in endocrine expression were higher significantly in NGR group （P 〈 0.05）. Conclusions Emergency PCI combined with distal protection device can help prevent distal embolism, reduce the risk of no-reflow and slow flow and thereafter improve the prognosis in AMI patients.

磁场对AMI大鼠血SOD活性及心肌ATP含量变化的影响

本实验将大鼠随机分为五组：空白对照组、磁作用对照组、ＡＭＩ组、ＡＭＩ药物（心得安）治疗组、ＡＭＩ磁场治疗组。分别采用四氮唑蓝法和生物发光法测定各组大鼠血红细胞ＳＯＤ活性及心肌ＡＴＰ含量。结果表明：ＡＭＩ磁场治疗组血红细胞ＳＯＤ活性及心肌ＡＴＰ含量均明显高于ＡＭＩ组（Ｐ＜０．０１），磁作用对照组高于空白对照组（Ｐ＜０．０５）。初步证实，磁场对ＡＭＩ大鼠和健康大鼠心肌具有一定的保护作用，此种作用对ＡＭＩ大鼠更为明显。