非ST段抬高型心肌梗死患者红细胞分布宽度与冠状动脉侧支循环的关系

目的:研究非ST段抬高型心肌梗死(NSTEMI)患者的冠状动脉侧支循环(CCC)形成与红细胞分布宽度(RDW)的关系。方法:选取南阳市中心医院和河南省人民医院心内科NSTEMI患者120例,采用Retrop分级方法,对CCC进行分级,分为CCC不良组(70例)和CCC良好组(50例)。RDW值采用全自动血细胞分析仪测定。结果:CCC不良组RDW水平显著高于CCC良好组(P0.05)。多因素Logistic回归分析显示RDW、肌酸激酶同工酶(CK-MB)、无梗死前心绞痛是不良CCC的独立预测因素。结论:在NSTEMI患者中,高RDW,高CK-MB、无梗死前心绞痛是不良CCC的独立预测因子。     

急性非ST段抬高性心肌梗死患者冠状动脉病变特点及其临床意义

目的分析急性非ST段抬高性心肌梗死患者冠状动脉病变特点及其临床意义。方法选择冠状动脉造影资料与临床资料完整的急性非ST段抬高性心肌梗死83例,以及同期急性ST段抬高性心肌梗死109例,分别就冠状动脉病变支数、狭窄程度、侧枝循环形成情况及临床特征进行对比分析。结果急性非ST段抬高性心肌梗死患者单支病变较ST段抬高性心肌梗死患者少(P<0.05),非ST段抬高性心肌梗死患者三支病变较ST段抬高性心肌梗死患者多(P<0.05),非ST段抬高性心肌梗死患者≥90%的狭窄病变较ST段抬高性心肌梗死患者多,但<90%的狭窄病变较ST段抬高性心肌梗死患者少(P<0.05),而两组间血管100%闭塞情况相似(P>0.05);非ST段抬高性心肌梗死患者Ⅱ级以上的侧枝循环较ST段抬高性心肌梗死患者多见(P<0.05);非ST段抬高性心肌梗死患者既往心绞痛与陈旧性心肌梗死病史多见(P<0.05),肌酸激酶同工酶峰值较ST段抬高性心肌梗死组明显要低(P<0.01),急性肺水肿、心源性休克、致死性心律失常等严重急性并发症比ST段抬高性心肌梗死组明显要少(P<0.05),左心室射血分数、住院期间死亡率和随访3年的冠心病死亡率与ST段抬高性心肌梗死组相似(P>0.05),而梗死后心绞痛比ST段抬高性心肌梗死组则明显增多(P<0.05)。结论急性非ST段抬高性心肌梗死冠状动脉病变相对复杂,多支及严重狭窄病变多,发作前多已有缺血预适应,且侧枝循环多见,这是心肌梗死形成非ST段抬高的主要原因,也决定了非ST段抬高性心肌梗死患者的临床特征。     

侧支循环在急性心肌梗死中作用

目的了解急性心肌梗死发生时侧支循环对心肌的保护作用。方法急性心肌梗死患者50例,在急性心肌梗死发作3 d内行冠状动脉造影术,根据冠状动脉造影判断侧支循环的分级,将病人分为侧支良好组和侧支不良组,对比分析两组患者的冠状动脉造影资料和临床资料。结果侧支良好组21例,侧支不良组29例。侧支良好组的肌酸激酶峰值及心肌型肌酸激酶同工酶MB(CK-MB)的峰值分别为(1853±790) U／L和(137±43)U／L,明显低于侧支不良组肌酸激酶峰值及心肌型肌酸激酶MB(5203±2685)U／L和(380± 225)U／L,差异有统计学意义(P<0．05)。两组心电图比较,侧支良好组异常Q波的出现率为24％;侧支不良组为100％(P<0．05)。侧支良好组心电图ST段抬高的总和均值分别为(1．1±1．2)mV,侧支不良组为(2．6± 1．2)mV(P<0．05)。心脏超声检查侧支良好组28％的患者心室壁运动正常,而侧支不良组中心室壁运动正常者仅占3％(P<0．05);侧支良好组的左心室射血分数(0．54±0．08)明显高于侧支不良组(0．44±0．08),P< 0．05。侧支良好组心律失常发生率24％,心源性休克发生率5％和病死率0％,而侧支不良组分别为17％, 24％和24％,差异有统计学意义(P<0．05)。结论良好的侧支循环对急性心肌梗死心肌有保护作用,防止左心室功能下降,保持心肌功能的完整性。     

急性冠脉综合征患者冠状动脉病变及心功能变化的临床比较

目的：比较国人急性冠脉综合征(ACS)的冠状动脉病变特点及其左心室收缩、舒张功能的变化。方法：边疆人院的急性冠脉综合征患者50例，其中ST段抬高型心肌梗死(STEMI)患者20例和非ST段抬高型心肌梗死(NSTEMI)患者30例，于梗死后2周行冠状动脉造影分析，同时行心脏彩超测定左室室壁运动及射血分数(INEF)。结果：NSTEMI组有糖尿病、陈旧性心肌梗死病史和反复心绞痛发作史比率均高于NSTEMI组；STEMI组肌酸激酶(CK)，肌酸激酶同工酶(CK-Mb)峰值高于STEMI组，且伴随急性心力衰竭发生率亦高于NSTEMI组；NSTEMI组患者多支病变、     

胸前导联合并Ⅱ、Ⅲ、avF导联ST段抬高的急性心肌梗死患者的临床和冠状动脉造影特点

目的：研究胸前导联合并Ⅱ、Ⅲ、avF 导联 ST 段抬高的急性心肌梗死患者的梗死相关动脉,评估其梗死面积和左心室功能减退程度,探讨如何通过心电图判断其梗死相关动脉。方法：将354例心电图表现为胸前导联 ST 段抬高的急性心肌梗死患者分为3组：A 组,胸前导联合并Ⅱ、Ⅲ、avF 导联 ST 段抬高(n=59),并根据梗死相关动脉进一步分为右冠状动脉闭塞者和左冠状动脉前降支闭塞者；B 组,单纯胸前导联 ST 段抬高(n=151)；C 组,胸前导联 ST 段抬高合并Ⅱ、Ⅲ、avF 导联 ST 段压低(n=144)。测定肌酸激酶(CK)和肌酸激酶 MB 同工酶(CK-MB),超声心动图测定左心室射血分数(LVEF),通过冠状动脉造影判断梗死相关动脉。结果：A 组的梗死相关动脉分别为右冠状动脉,约56%；左冠状动脉前降支,约37%。其中,右冠状动脉闭塞者,闭塞部位多为右冠状动脉近段,ST 段抬高幅度在Ⅲ导联＞Ⅱ导联,在V_1导联＞V_3导联；左冠状动脉前降支闭塞者,闭塞部位多为左冠状动脉前降支中远段,ST 段抬高幅度在 V_3导联＞V_1导联。B 组和 C 组梗死相关动脉几乎均为左冠状动脉前降支(分别为96%和95%)。与其他两组相比,A 组 ST 段抬高的导联数最多,但 CK-MB 峰值最低,LVEF 值最高。结论：胸前导联合并Ⅱ、Ⅲ、avF 导联 ST 段抬高的急性心肌梗死,可能是由右冠状动脉近段闭塞或环绕心尖部的左冠状动脉前降支远段闭塞引起的。其心肌梗死面积相对较小,心功能受损较少。在这些患者中,如果Ⅱ、Ⅲ、avF 导联 ST 段抬高的总幅度较大,ST 段抬高幅度在Ⅲ导联＞Ⅱ导联,在 V_1导联＞V_3导联,梗死相关动脉为右冠状动脉的可能性较     

非ST段抬高性心肌梗死与ST段抬高性心肌梗死的临床特征探析

目的对非ST段抬高性心肌梗死及ST段抬高性心肌梗死患者的临床特征进行探讨。方法选取2014年2月~2015年1月我院收治的急性心肌梗死患者138例作为研究对象,并根据患者心电图所显示的ST段是否抬高将其分成甲组和乙组。甲组为非ST段抬高性心肌梗死患者70例;乙组为ST段抬高性心肌梗死患者68例。对两组患者的临床特征进行对比分析,并就分析的结果对其治疗进行指导。结果甲组非ST段抬高性心肌梗死患者多数有糖尿病及心绞痛等病史,且患者的冠状动脉出现侧支循环,极易发生弥漫性病变;乙组ST段抬高性心肌梗死患者极易发生心律失常及心源性休克,其冠状动脉病变多发于单支。两组患者致死率对比,差异无统计学意义(P0.05)。结论有心绞痛、糖尿病病史的患者更易发生非ST段抬高心肌梗死,且其冠状动脉病变多发于多个分支,极易并发于多个侧支循环,其治疗预后情况相对较差。     

非ST段抬高性心肌梗死与ST段抬高性心肌梗死的临床特征分析

目的 探讨非ST段抬高性心肌梗死与ST段抬高性心肌梗死的临床特征.方法 回顾分析我院急性心肌梗死126例的临床资料,根据心电图有无ST段抬高分为两组,对比分析其临床特征,从而用于指导治疗.结果 非ST段抬高性心肌梗死病人既往多有糖尿病及心绞痛病史,患者冠状动脉病变较弥漫,有侧支循环建立;而ST段抬高性心肌梗死病人易合并有心律失常、心源性休克等表现,冠脉病变多为单支,两者死亡率无明显差异.结论 非ST段抬高性心肌梗死易发生于糖尿病患者,既往有反复心绞痛发作病史,冠脉病变多为多支,多有丰富侧支循环,但预后差.     

首次急性ST段抬高与非ST段抬高心肌梗死患者临床及冠状动脉病变特点比较

目的回顾性分析比较首次发生急性ST段抬高心肌梗死与非ST段抬高心肌梗死的临床及冠状动脉病变的特点。方法选择首次急性ST段抬高心肌梗死患者50例(ST段抬高组)和急性非ST段抬高心肌梗死患者50例(非ST段抬高组),均行冠状动脉造影检查,对其发病特点、临床表现、并发症、心功能以及冠状动脉病变进行回顾性分析。结果 ST段抬高组起病急,主要以剧烈胸痛为主,就诊时间较早,非ST段抬高组首发症状多样。ST段抬高组总并发症、室性心律失常、窦性心动过缓及传导阻滞发生率明显高于非ST段抬高组(P<0.01),左心室射血分数明显低于非ST段抬高组(P<0.05)。与ST段抬高组比较,非ST段抬高组冠状动脉病变血管支数较多,3支病变、侧支循环比例较高(P<0.05,P<0.01)。结论急性ST段抬高心肌梗死起病急,并发症多,影响心功能,应积极尽快实施血运重建,以开通梗死相关血管,但急性非ST段抬高心肌梗死冠状动脉病变往往较重。急性心肌梗死的近期预后与起病急缓、透壁性心肌坏死范围等有关。     

aVR导联ST段改变对急性非ST段抬高型心肌梗死相关血管的判定及临床意义

目的探讨体表心电图a VR导联ST段改变对急性非ST段抬高型心肌梗死病人梗死相关血管(IRA)的判定及临床意义。方法回顾性分析230例临床确诊为急性非ST段抬高型心肌梗死病人的临床资料、心电图及冠状动脉造影结果。依据心电图a VR导联ST段变化将病例分为A组(ST抬高组)、B组(ST下移组)和C组(ST无偏移组)。结果冠状动脉造影结果:ST抬高组左主干病变、左前降支病变的发生率明显高于ST下移组和ST无偏移组,差异有统计学意义(P0.05);ST下移组左回旋支病变及右冠状动脉病变的发生率明显高于ST抬高组和ST无偏移组,差异有统计学意义(P0.05);ST抬高组和ST下移组双支病变及三支病变的发生率明显高于ST无偏移组,差异均有统计学意义(P0.05)。a VR导联ST段抬高组、下移组主要不良心血管事件发生率均明显高于ST无偏移组(P0.05)。结论急性非ST段抬高型心肌梗死病人如果伴有a VR导联ST段抬高或下移可能提示梗死相关血管为左主干病变、左前降支病变、左回旋支病变、右冠状动脉病变或严重的多支病变,且住院期间不良心血管事件发生率增高。a VR导联ST段改变对急性非ST段抬高型心肌梗死病人梗死相关血管的判定及临床预后均具有重要的临床指导意义。     

不同类型老年急性心肌梗死患者的临床特点比较

目的探讨不同类型老年急性心肌梗死患者的临床特点及血运重建状况。方法对比分析262例ST段抬高心肌梗死(STEMI)患者(STEMI组)和189例非ST段抬高心肌梗死(NSTEMI)患者(NSTEMI组)的临床特点,冠状动脉病变及院内血运重建情况。结果与NSTEMI组比较,STENM1组患者男性比例多,平均年龄相对偏小,典型胸痛症状比例高,血肌酸激酶和肌酸激酶同工酶明显高,差异有统计学意义(P<0.05)。而NSTEMI组患者伴有高血压、血脂异常和2型糖尿病比例多,差异有统计学意义(P<0.05)。NSTEMI组多支血管病变、弥漫病变、≥90%严重狭窄的梗死相关动脉(IRA)比例、IRA闭塞的侧支循环开放率均明显高于STEMI组(P<0.05,P<0.01);而IRA完全闭塞率低于STEMI组,差异有统计学意义(P<0.01)。NSTEMI组住院期间血运重建率显著低于STEMI组,差异有统计学意义(P<0.01)。2组院内主要不良心脏事件发生率类似。结论老年NSTEMI患者临床合并症较多,冠状动脉病变较重,血运重建比例低。     

红细胞分布宽度与冠状动脉病变严重程度有相关性

目的 目的探讨红细胞分布宽度（RDW）与冠心病患者冠状动脉病变严重程度的关系。方法 连续入选行冠脉造影患者219例,其中不稳定型心绞痛(UAP)118例,急性心肌梗死（AMI）101例,其中包括急性ST段抬高型心肌梗死(STEMI)52例,急性非ST段抬高型心肌梗死(NSTEMI)49例。所有患者均检测RDW及 N末端脑钠肽前体（NT-proBNP）等相关指标,并对患者冠脉病变情况进行SYNTAX评分,根据SYNTAX评分将所有患者分为低积分组（评分≤32分,n=139）与高积分组（评分>32分,n=80）。通过单因素分析和Pearson相关分析确定RDW与冠状动脉严重程度的关系。结果 高积分组RDW〔（13.7±0.9）%〕显著高于低积分组〔（12.4±1.4）%〕,差异有统计学意义（P<0.05）。冠状动脉2支及以上病变患者的RDW显著高于单支病变组（P<0.05)。Pearson相关分析显示RDW与SYNTAX评分呈显著正相关（r=0.252,P<0.01）。NT-proBNP升高组比NT-proBNP正常组的RDW〔（13.4±0.8） vs.（12.5±1.0）%〕明显升高,差异有统计学意义（P<0.05）。结论 冠心病患者RDW与冠心病冠脉病变严重程度具有显著相关性。     

Implicações do índice de dispersão eritrocitária no risco de eventos hemorrágicos em doentes com síndrome coronária aguda sem supradesnivelamento do segmento ST

IntroductionHigher values of red blood cell distribution width (RDW) have recently been associated with worse outcome in patients with cardiovascular disease. However, its relation to bleeding events in patients with non-ST elevation acute coronary syndromes has not been established.AimTo determine the prognostic value of RDW in patients with non-ST segment elevation acute coronary syndromes, particularly regarding the risk of major bleeding.MethodsWe analyzed 513 consecutive patients admitted with non-ST elevation acute coronary syndromes. The population was divided into tertiles of baseline RDW and clinical, laboratory characteristics and adverse events were analyzed for each group. The primary outcome was defined as the occurrence of major bleeding (according to the Crusade bleeding score). The predictive value of RDW for risk of major bleeding was determined.ResultsThe mean RDW was 15.13%±1.62%. Patients in the third tertile were older and more frequently had renal dysfunction or previous coronary revascularization. Higher values of RDW were associated with greater risk of major bleeding and in-hospital death. RDW >15.7% was an independent predictor of bleeding events (odds ratio 3.1, 95% CI 1.4-6.9).ConclusionsIn a population of patients with non-ST elevation acute coronary syndromes, RDW was associated with higher in-hospital mortality and was an independent predictor of in-hospital major bleeding.     

Mean platelet volume is associated with culprit lesion severity and cardiac events in acute coronary syndromes without ST elevation

We investigated the association of mean platelet volume (MPV) with culprit lesion severity and major cardiac outcomes (MCOs) in patients with acute coronary syndrome (ACS) with non-ST elevation (NSTE). This study included 344 patients with NSTE-ACS who had significant coronary stenosis at least 50%. They were divided into high MPV group (n = 109, upper tertile >9.9 fl) and low MPV group (n = 235, lower and mid tertile ≤ 9.9 fl) according to MPV values on admission. They were followed up for MCOs during 12 months. MCO consisted of the composite end-point of cardiac death, myocardial infarction (MI), recurrent angina or hospitalization. High MPV was independently associated with NSTE-MI [odds ratio (OR) 4.24, 95% confidence interval (CI) 2.52-7.15, P = 0.001] and severe culprit stenosis (≥ 80%) (OR 4.05, 95% CI 2.39-6.83, P = 0.001). MPV of 9.9 fl was predictive of severe culprit stenosis with a sensitivity of 73% and specificity of 77% (P < 0.001). At 12 months, MCO rate was higher in high MPV group than low MPV group (39 vs. 26%; P = 0.016). This difference resulted from death (6.4 vs. 2.1; P = 0.06) and recurrent angina (16.5 vs. 8.9%; P = 0.045). The MCO-free survival was worse in patients with high MPV than those with low MPV (61 vs. 74%; P = 0.01). In Cox regression analysis, high MPV remained an independent predictor of MCO (hazard ratio 1.52, 95% CI 1.01-2.29, P = 0.04) after adjusting for baseline characteristics. Elevated MPV was independently associated with NSTE-MI presentation and severity of culprit stenosis in NSTE-ACS patients. Moreover, MPV greater than 9.9 fl was predictive of a 12-month MCO.     

急性心肌梗死患者循环miR-208b-3p诊断价值的研究

目的：探讨急性心肌梗死患者循环miR-208b-3p与正常健康人的表达是否具有差异,及其在不同亚组中的诊断价值探索。方法：收集140例急性心肌梗死(acute myocardial infarction, AMI)患者入院即刻血浆样本和19例健康人(healthy controls, HC)血浆样本,特异茎环反转录实时定量PCR(qRT-PCR)检测样本miR-208b-3p的表达水平,并与超敏肌钙蛋白I(hs-TnI)和肌酸激酶-同工酶(CK-MB)进行对比分析;qRT-PCR检测ST段抬高性型心肌梗死(ST segment elevation myocardial infarction, STEMI)和非ST段抬高性心肌梗死(non-ST segment elevation myocardial infarction, NSTEMI)患者血浆miR-208b-3p表达水平,ROC曲线评估诊断价值。结果：AMI组和HC组血浆miR-208b-3p的表达量分别为43.86±7.50和2.05±0.62,差异具有统计学意义(P < 0.05);miR-208b-3p与CK-MB呈明显正相关(r = 0.546,P < 0.001),miR-208b-3p、CK-MB和hs-TnI ROC曲线下面积(AUC)分别是0.874(P < 0.001)、0.976(P < 0.001)和0.971(P < 0.001);STEMI亚组和NSTEMI亚组血浆miR-208b-3p表达量分别为55.04±10.44和21.01±7.13,差异具有统计学意义(P < 0.05),AUC分别为0.935(P < 0.001)和0.749(P < 0.01)。结论：循环miR-208b-3p可作为AMI患者的早期诊断标准,但不优于hs-TnI和CK-MB;循环miR-208b-3p对于STEMI亚组的诊断敏感性和特异性高于NSTEMI亚组。     

Evaluation of left ventricular function using Tei index in patients with preinfarction angina.

OBJECTIVE: The study investigated whether preinfarction angina influences left ventricular functions assessed using Tei index, which is an independent predictor for left ventricular dysfunction in acute myocardial infarction. METHODS: We studied 96 patients with acute myocardial infarction with ST segment elevation (80 men, 16 women; mean age 57.5+/-9.9 years) who were assigned into 2 groups: with and without preinfarction angina. All patients were serially evaluated by 2-dimensional and Doppler echocardiography on the days 1, 6, and 30, and were followed up for 30 days for incidence of complications. RESULTS: We observed that Tei index was lower on the days 1, 6 and 30 (0.49+/-0.20 vs. 0.59+/-0.20, p=0.003, 0.46+/-0.20 vs. 0.56+/-0.20, p=0.001, 0.44+/-0.20 vs. 0.53+/-0.10, p=0.01) in patients with preinfarction angina as compared with those without angina. Tei index significantly decreased during follow-up (0.49+/-0.20, 0.46+/-0.20, 0.44+/-0.20; p=0.02) in patients with preinfarction angina, while it did not change significantly in patients without preinfarction angina (p=0.2). Echocardiographically significant improvements were observed in E deceleration time, isovolumic relaxation time and ejection time in all patients, whereas significant improvements in ejection fraction, wall motion score index and isovolumic contraction time were observed only in patients with preinfarction angina during follow-up. Mortality, Killip class >or=2, pericarditis, atrial fibrillation, and left ventricular thrombus were lower in patients with preinfarction angina. CONCLUSION: These data indicated that the patients with preinfarction angina had better preserved systolic left ventricular function and Tei index values. Also, it was observed that preinfarction angina may cause earlier and more prominent myocardial functional recovery and confer protection against complications on short-term after first acute myocardial infarction.     

强化阿托伐他汀对急性冠状动脉综合征患者选择性介入治疗围手术期的影响

目的探讨负荷剂量阿托伐他汀对非ST段抬高急性冠状动脉综合征(NSTEACS)患者PCI围手术期的影响。方法将81例NSTEACS患者随机分为负荷治疗组41例和标准治疗组40例,负荷治疗组PCI术前12 h顿服阿托伐他汀80 mg,PCI术前2 h追加阿托伐他汀40 mg。2组术前、术后8和24 h抽取肘静脉血,检测血清肌酸激酶同工酶(CK-MB)、血浆肌钙蛋白(cTnI)和高敏C反应蛋白(hs-CRP)等。随访30 d主要不良心脏事件发生率。结果与PCI术前比较,2组PCI术后CK-MB、cTnI和hs CRP均明显升高(P0.01),但负荷治疗组CK-MB、cTnI和hs-CRP升高水平显著低于标准治疗组(P0.01)。负荷治疗组心肌损伤标记物升高发生率较标准治疗组显著降低(7.3%vs 32.5%,P=0.003;24.4%vs 47.5%,P=0.030)。负荷治疗组主要不良心脏事件发生率较标准治疗组低(2.4% vs 22.5%,P=0.01 61),心肌梗死发生率下降(2.4%vs20.0%,P=0.0307)。结论 NSTEACS患者PCI术前应用阿托伐他汀负荷剂量,能减少PCI术对患者造成的心肌损伤及炎性反应,还可降低PCI术后不良心脏事件的发生,而且安全有效。     

Spontaneous dissection of the left main coronary artery

Spontaneous coronary artery dissection remains a rare but important cause of acute coronary syndromes. Presentation depends on the extent of the dissection, the vessels involved and the rate of its development, and can encompass the entire spectrum of coronary syndromes, with some patients being asymptomatic and others presenting with angina, non-ST segment elevation myocardial infarction, ST-elevation myocardial infarction and sudden cardiac death. The authors describe a 33-year-old pregnant woman who presented with a non-ST segment elevation myocardial infarction secondary to a spontaneous dissection of the left main coronary artery.     

红细胞分布宽度、平均血小板体积与早发冠心病的相关性

目的探讨红细胞分布宽度(RDW)、平均血小板体积(MPV)在早发冠心病人群中的分布特征及其与冠状动脉病变严重程度的关系,评价RDW、MPV对早发冠心病的诊断价值。方法收集因胸痛发作疑诊冠心病且男性55岁、女性65岁的患者407例,经冠状动脉造影(CAG)确诊早发冠心病组309例,余98例为正常对照组。比较2组及早发冠心病各疾病亚组间的RDW、MPV水平,分析RDW、MPV与冠状动脉病变严重程度(Gensini评分)的相关性及早发冠心病的独立危险因素。结果早发冠心病组RDW、MPV水平明显高于正常对照组(P0.05),RDW、MPV在急性心肌梗死(AMI)组、不稳定型心绞痛(UAP)组和稳定型心绞痛(SAP)组均高于正常对照组(P0.05)。早发冠心病组RDW、MPV与Gensini评分之间存在正相关(r分别为0.246、0.199,P0.05);多因素Logistic回归分析显示RDW(OR=3.373,95%CI:2.197～6.359,P0.001)和MPV(OR=1.353,95%CI:1.074～1.705,P=0.010)是早发冠心病的独立危险因素。R0C曲线分析发现,RDW诊断早发冠心病的界点值为12.25%(敏感性69%,特异性72%),MPV诊断早发冠心病的界点值为8.55 fl(敏感性91%,特异性37%)。结论 RDW、MPV与早发冠心病的临床类型及冠状动脉病变的严重程度有关,是早发冠心病的独立危险因素,为早发冠心病的诊断提供一定依据。     

Effect of preinfarction angina pectoris on ST-segment resolution after primary coronary angioplasty for acute myocardial infarction

The presence of preinfarction angina has been shown to exert a favorable effect on left ventricular function after acute myocardial infarction (AMI). Whether or not preinfarction angina is beneficial for myocardial tissue reperfusion, however, remains to be determined. We sought to evaluate the influence of preinfarction angina on resolution of ST-segment elevation, which could be affected by microcirculatory damage after recanalization therapy. We studied 96 patients with a first AMI in whom Thrombolysis In Myocardial Infarction (TIMI)-3 flow in the infarct-related artery was established by primary angioplasty. Percent reduction in the sum of ST elevation from baseline to 1 hour after angioplasty (percent delta summation operator ST) was examined. Poor ST resolution, defined as percent delta summation operator ST <50%, was observed in 25 patients, who had a worse clinical outcome, larger infarct size, and poorer left ventricular function. On multivariate analysis, the absence of preinfarction angina, as well as anterior wall infarction, were major independent predictors of poor ST resolution, whereas age, sex, coronary risk factors, ischemic time, Killip class on admission, multivessel disease, initial TIMI flow grade, and extent of collaterals were not significant. Patients with preinfarction angina had a greater degree of ST-segment resolution than those without angina (71 +/- 21% vs 49 +/- 43%, p = 0.02). Additional ST elevation after reperfusion was noted exclusively in patients without preinfarction angina (p = 0.02). Preinfarction angina is associated with a greater degree of ST-segment resolution in patients with TIMI-3 flow after primary angioplasty, suggesting a protective effect of preinfarction angina against microcirculatory damage after reperfusion.