急性前壁心肌梗死合并完全性房室传导阻滞的冠状动脉造影特点

目的:分析急性前壁心肌梗死合并完全性房室传导阻滞的冠状动脉造影特点.方法:2004-03-2009-03上海交通大学附属第一人民医院心内科共收治急性前壁心肌梗死合并新发完全性房室传导阻滞患者19例,其中14例行冠状动脉造影术,多体位投照观察病变特点,明确梗死相关动脉.并根据主要冠状动脉直径狭窄≥50%的支数,分为左主干病变,单支病变,2支病变,3支病变.结果:14例患者冠状动脉造影均提示冠状动脉严重病变.单支病变1例,2支病变3例,3支病变8例,左主干加3支病变2例.梗死相关动脉12例为左冠状动脉,闭塞部位1例在左主干;9例在左前降支近段,其中4例提供侧支至右冠状动脉远段,2例提供侧支至左回旋支远段;1例在左前降支中段,右冠状动脉变异,开口于闭塞远段;1例在左回旋支近段,提供侧支至右冠状动脉.2例梗死相关动脉为右冠状动脉,闭塞部位1例在近段,为优势型;1例在中段,远段提供侧支至左前降支之第一间隔支.结论:急性前壁心肌梗死合并新发完全性房室传导阻滞患者冠状动脉病变严重,多为多支多处重度狭窄,梗死相关动脉供血范围较广,分别或同时累及第一间隔支动脉、房室结动脉,间接提示临床预后较差.     

急性下壁心肌梗死心电图研究新进展

随着心血管介入性治疗的广泛开展,尤其是冠状动脉造影术和溶栓治疗的临床应用,急性心肌梗死心电图诊断技术有了较大的提高。现将近年来急性下壁心肌梗死心电图研究进展综述如下。 一、急性下壁心肌梗死冠状动脉病变分布的研究 冠状动脉造影发现;急性下壁心肌梗死中70.6％为单支病变(其中61.8％为右冠状动脉病变,8.8％为左旋支病变,无单独左前降支病变),右冠状动脉合并左前降支病变占8.8％;合并左旋支病变占14.7％;三支病变占2.9％;冠状动脉造影正常2.9％,右冠状动脉痉挛2.9％。结果表明,急性下壁心肌梗死时91.2％为右冠状动脉单支病变或合并左旋支、左前降支病变,少数为单独左旋支病变,个别梗死病例是右冠状动脉痉挛所致。 二、急性下壁心肌梗死合并严重心脏传导阻滞 急性下壁心肌梗死有27.7％—39.5％合并二度、三度房室传导阻滞(AVB),当房室传导阻滞发生在ST段抬高、T波直立、无或只有小Q波及高大R波者,大多数在12—28h内恢复正常传导,少数1周内恢复;房室传导阻滞发生在出现病理性Q波之后、T波倒置、ST段抬高已回到等电位线者,持续时间长,仅部分能在48h内恢复正常传导,无论早发或晚发者,均可以在9—10天内恢复正常传导,目前认为,急性下壁心肌梗死并发二、三度房室传导阻滞属可逆性,与梗死面积     

右室流出道起搏治疗急性心肌梗死并发Ⅲ度房室传导阻滞2例报告

急性心肌梗死中完全性房室传导阻滞(CAVB)发生率为2%-10%,下壁心肌梗死出现房室传导阻滞为前壁心肌梗死的2-3倍。急性下壁心肌梗死的病人中,约30%同时伴发右心室梗死。伴发右心室梗死时,房室传导阻滞更为常见。现将我院收治2例急性下壁、右室心肌梗死并发Ⅲ度房室传导阻滞(AVB)出现右室收尖部,靠近室间隔及右室流入道起搏阈值显著增高患者的起搏治疗报道如下。     

直接经皮冠状动脉腔内成形术治疗急性前壁心肌梗死合并泵衰竭的体会

目的探讨直接经皮冠状动脉腔内成形术(PTCA)治疗急性前壁心肌梗死(AMI)合并泵衰竭的近期及远期疗效.方法对急性前壁心肌梗死合并泵衰竭发病至入院时间<12小时的28例患者行直接PTCA并置入冠状动脉内支架.结果28例梗塞相关冠状动脉(IRCA)均为左前降支(LAD)近端或起始部,TIMI血流0～Ⅰ级,单支病变15例、双支病变9例、三支病变4例,PTCA即刻成功率100%,IRA血流均达TIMIⅢ级灌注.1例未置入支架者手术后第二天再发胸痛,并发急性肺水肿死亡.27例存活病例随访1～36个月无死亡,LVEF59.8±6.5%.结论对前壁心肌梗死合并泵衰竭,包括对升压药有反应的KillipⅣ级患者行直接PTCA安全、可靠、可明显改善心功能,降低病死率提高近期及远期疗效.     

19例梗死相关动脉为优势左回旋支的急性心肌梗死心电图表现

目的分析19例梗死相关动脉为优势左回旋支的急性心肌梗死患者的心电图表现,总结其特点。方法回顾性分析2000年9月至2005年12月急性心肌梗死患者的心电图资料,25例急性心肌梗死经冠状动脉造影证实梗死相关动脉为优势左回旋支,选取其中发病12h内有12或18导联心电图记录的19例,分析其发病时心电图表现及特征。结果19例患者中2例表现为非ST段抬高性心肌梗死,冠脉造影证实血管已再通,血流正常。17例表现为下壁ST段抬高性心肌梗死,15例合并后壁ST段抬高,2例V4RST段抬高,14例V4RST段压低。12例ST段抬高(STIII↑>STII↑)和ST段压低(STaVL↓>STI↓)同时出现。12例aVR导联ST段压低。19例中3例合并有完全性房室阻滞,1例合并高度房室阻滞。结论梗死相关动脉为优势左回旋支的急性心肌梗死患者心电图图形特点类似右冠脉闭塞的ST段抬高心肌梗死,STIII↑>STII↑,STaVL↓>STI↓,两者很难鉴别,下壁、后壁ST段抬高而RV4和STaVR压低可能是重要特点。     

前壁AMI合并CRBBB的冠脉病变特点

目的探讨急性前壁心肌梗死合并完全性右束支阻滞的冠状动脉病变特点。方法回顾2018年1月至2019年12月的102例急性前壁心肌梗死患者的冠状动脉造影结果,分为完全性右束支阻滞组(38例)和不合并束支传导阻滞组(64例),对比两组之间的冠状动脉病变特点。结果观察组罪犯血管左冠状动脉前降支罪犯段位于第一间隔支以上病例数有32例(84.2%),对照组26例(40.6%);两组比较差异有统计学意义(p0.001)。观察组左冠状动脉前降支内血栓例数有22例(57.9%),对照组20例(31.3%),两组比较差异有统计学意义(p=0.002)。观察组有侧支循环3例(7.9%),均为Rentrop侧支等级Ⅰ级,来源于右冠状动脉;对照组:26例(40.6%),来源于右冠状动脉22例,左冠状动脉回旋支4例,Rentrop侧支等级Ⅱ级20例,Rentrop侧支等级Ⅰ级6例,两组比较差异有统计学意义(p0.001)。结论观察组对比对照组其左冠状动脉前降支病变部位多发生于第一间隔支近段,其血栓发生率高于对照组,侧支循环形成远低于对照组。     

急性下壁、右室梗塞合并完全性房室阻滞的临床预后(摘要)

<正> 从87例急性下壁心肌梗塞中选出有右室梗塞病人41例。41例病人根据是否合并完全性房室阻滞分成两组:15例有完全性房室阻滞(组Ⅰ)、26例无完全性房室阻滞(组Ⅱ)。诊断标准:1.急性心肌梗塞:符合WHO标准。2.右室梗塞:①在下壁导联有典型改变病人的右胸导联V_(3R)、V_(4R)有ST段抬高≥0.1mV;②其中15例有Swan-Ganz导管监测资料:右房平均压>1.33kPa及/或右房压/肺毛细血管楔压>0.65。3.Killip>Ⅱ级为急性左心衰竭。统计学处理采用t检验、x~2检验。两组病人各因素比较见附表。讨论急性下壁心肌梗塞合并完全性房室阻滞病人住院病死率文献报道不一(19～45％)。Mavric     

墓碑型心电图改变心肌梗死患者冠状动脉病变特点及临床意义

目的探讨墓碑型心电图改变急性前壁心肌梗死患者冠状动脉病变特点及临床意义。方法102例接受急诊冠状动脉介入治疗的急性前壁心肌梗死患者,根据心电图特点,分为墓碑型急性心肌梗死组(31例)和非墓碑型急性心肌梗死组(71例)。对比分析两组冠脉造影特点和住院期间主要心脏事件的发生情况。结果除墓碑型急性心肌梗死组梗死前心绞痛比例明显低于非墓碑型组(p<0.01)外,两组的年龄、性别、易患因素差异无统计学意义(p>0.05)。与非墓碑型急性心肌梗死组相比,墓碑型急性心肌梗死组罪犯血管病变多位于左前降支近端(64.5%vs36.6%,p<0.01),合并右冠状动脉和左回旋支病变的比例高(51.6%vs21.1%,p<0.01;38.7%vs17.0%,p<0.01),术前TIMI血流分级0～1级的比例明显高于非墓碑型急性心肌梗死组(83.9%vs59.1%,p<0.05)。两组CK-MB峰值、LVEF值及主要不良心脏事件无显著性差异(p>0.05)。结论墓碑型急性前壁心肌梗死患者罪犯病变多位于左前降支近端,且多为完全闭塞性病变,常合并其他冠脉病变及缺乏良好的侧支循环保护,积极急诊介入治疗能明显改善其预后。     

接受再灌注治疗的急性下壁心肌梗塞患者并发的完全性房室传导阻滞

在急性下壁心梗并发完全性房室传导阻滞(CAVB)的患者中,心梗面积较大,则住院死亡率较高。然而迄今尚未阐明接受再灌注治疗的患者并发 CAVB 的临床意义。本研究包括373例患者,其中50例(13%)下壁心梗并发 CAVB,且在症状发作6小时内给予溶栓治疗。并发或未并发 CAVB 的患者,溶栓治疗后梗塞区供血冠脉的即刻畅通率相近。在对照和出院前测定心室功能,CAVB     

35例急性前壁心肌梗死合并完全性右束支传导阻滞临床预后分析

目的:探讨急性前壁心肌梗死合并完全性右束支阻滞(CRBBB)患者冠状动脉病变特点及与临床预后的关系。方法:比较分析35例急性前壁心肌梗死伴CRBBB患者和371例同期急性心肌梗死患者的临床事件、心电图、多普勒超声、冠状动脉造影和治疗预后情况。结果:急性前壁心肌梗死伴CRBBB患者年龄、血压明显高于对照组(P<0.05);其中53.7%的患者发生恶性心律失常或心脏骤停,冠状动脉造影显示100%有前降支病变,85%为多支病变,溶栓和介入治疗后生存率达68.6%。结论:急性前壁心肌梗死伴CRBBB患者易出现恶性心律失常,血管病变多为伴前降支病变的多支病变,早期溶栓和介入治疗可能改善其预后。     

急性前壁心肌梗死并下壁导联ST段压低与冠状动脉病变的关系

目的：观察急性前壁心肌梗死下壁导联ＳＴ段压低与冠状动脉病变的关系。方法：对６６例急性前壁心肌梗死患者均常规行冠状动脉造影术,根据常规心电图下壁导联ＳＴ段压低＞１ｍｍ分为ＳＴ段压低组（４８例）与ＳＴ段正常组（１８例）,比较分析心电图与冠状动脉造影之间的关系。结果：急性前壁心肌梗死患者２７．３％有下壁导联ＳＴ段压低,ＳＴ段压低组中冠状动脉病变支数与正常组无显著性差异（Ｐ＞０．０５）,７３．２％为左前降支（ＬＡＤ）近端病变,显著高于ＳＴ段正常组（４５．８％）。ＳＴ段压低组５５．６％伴有心电图ＳＴＩ,ａＶＬ抬高,显著高于ＳＴ段正常组（４．２％）（Ｐ＜０．０１）。结论：急性前壁心肌梗死并下壁导联ＳＴ段压低与冠状动脉病变支数无关,而与ＬＡＤ近端病变有关,可能反映高侧壁心肌缺血时的心电图对应性改变。     

急性下壁心肌梗塞伴房室传导阻滞发生与冠状动脉病变的关系

目的 :研究急性下壁心肌梗塞伴房室传导阻滞 (AVB)发生与冠状动脉病变之间的关系。　　方法 :40例急性下壁心肌梗塞患者分为房室传导阻滞组 (AVB组 ,n=16 )和无房室传导阻滞组 (NAVB组 ,n=2 4) ,分析两组间肌酸激酶峰值、冠状动脉病变支数、多支冠状动脉严重病变及优势型冠状动脉狭窄程度对 AVB发生的影响。　　结果 :AVB发生与优势型冠状动脉狭窄严重程度有关 ,狭窄程度越高 ,则 AVB发生率越高 ,L ogistic多元回归分析显示优势型冠状动脉狭窄程度是唯一有意义的危险因素 (P=0 .0 0 2 9,OR=8.86 0 1)。　　结论 :优势型冠状动脉的严重阻塞是 AVB发生的一个独立因素。     

Outcome of urgent percutaneous transluminal coronary angioplasty in acute myocardial infarction: comparison of single-vessel versus multivessel coronary artery disease.

Despite recent clinical trials of percutaneous transluminal coronary angioplasty (PTCA) in acute myocardial infarction, specific groups of patients that may benefit from adjunctive or alternative therapy have yet to be adequately characterized. The in-hospital outcome of 151 consecutive patients treated for acute myocardial infarction with urgent PTCA of the infarct-related artery was studied to identify a subgroup of patients at high risk. Patients were divided into two groups based on the angiographic presence of either single-vessel (n = 86) or multivessel (n = 65) coronary artery disease. Despite PTCA of only the infarct-related artery and similar baseline clinical characteristics such as age, peak serum creatine kinase concentration, left ventricular ejection fraction, and time from the onset of chest pain to arrival at the hospital, the group with multivessel disease had a lower rate of successful angioplasty (75% vs 92%, p < 0.005), with higher incidences of persistent total occlusion of the infarct-related artery (14% vs 3%, p < 0.02) and procedural complications during PTCA (28% vs 13%, p < or = 0.02), and were more likely to have multiple complications (12% vs 1%, p < 0.004). In addition, the group with multivessel disease had a higher rate of urgent (< or = 24 hours) coronary artery bypass graft surgery (13% vs 2%, p < 0.05) and a trend toward a higher in-hospital mortality rate (6% vs 1%, p < or = 0.17). By stepwise logistic regression, only the presence of single-vessel versus multivessel disease was predictive of PTCA success (p < 0.005).(ABSTRACT TRUNCATED AT 250 WORDS)     

急性下壁心肌梗死患者血B型利钠肽的研究

目的:探讨急性下壁心肌梗死(AIMI)患者伴或不伴有右心肌梗死与血浆B型利钠肽(BNP)水平的相关性.方法:入选AIMI患者213例,依据临床表现、心电图和冠状动脉造影将213例AIMI患者分为伴有右心室梗死组(A组) 和单纯AIMI组(B组),另选同时期住院冠状动脉造影正常者98例作正常对照组.测定各组及AIMI中不同病变部位者BNP水平,并对不同BNP水平患者进行住院期间、30 d、3个月死亡事件及主要心脏不良事件的临床观察.结果:A组血浆BNP水平明显高于B组(P<0.01).右冠状动脉近段和中段病变患者血浆BNP水平显著高于左回旋支病变患者(P<0.01).AIMI患者中血浆BNP水平升高独立于各因素预测30 d和3个月病死率及心脏不良事件发生率(r=0.701 0, 95% CI:<0.01～0.615, P<0.01).结论:BNP水平可能对AIMI伴右心室梗死有预测作用.     

Results of percutaneous transluminal coronary angioplasty for angina pectoris early after acute myocardial infarction

Between May 1980 and July 1985, 70 patients underwent percutaneous transluminal coronary angioplasty (PTCA) for angina occurring 24 hours after and within 30 days of acute myocardial infarction (32 with Q-wave infarction and 38 with non-Q-wave infarction). One-vessel disease was present in 42 (60%) and multivessel in 28 (40%); the mean ejection fraction was 0.56 (greater than or equal to 0.50 in 77% of patients). PTCA was successful in 56 patients (80%) and after introduction of steerable dilating systems in February 1983 this rate became 86%. The success rate for complete occlusions was 76%. The interval from myocardial infarction to PTCA was similar in patients with successful dilation (12.7 +/- 8.1 days) and those without (13.4 +/- 8.0 days). PTCA failed in 14 patients (20%); 8 underwent emergency coronary artery bypass for acute occlusion and 4 of 6 patients whose lesions could not be crossed had elective bypass surgery. There was 1 operative death. No patient sustained a Q-wave infarction. Three patients had non-Q-wave infarctions after technically successful PTCAs. Mean follow-up was 27 months (6 to 67 months). Of the 56 patients successfully dilated, 14 (25%) had 15 cardiac events during follow-up: death (1), non-Q-wave infarction (2), repeat PTCA (7), coronary bypass (4) and recurrence of severe angina (1). The cumulative mortality was 3% and the reinfarction rate was 7% (no Q-wave reinfarctions). Forty-two (60%) of the 70 patients were free of complicating events acutely and during follow-up.(ABSTRACT TRUNCATED AT 250 WORDS)     

The angiographic correlation between ST segment depression in noninfarcted leads and the extent of coronary artery disease in patients with acute inferior myocardial infarction: a clue for multivessel disease

BACKGROUND: Although reciprocal ST segment depression (RSTD) in patients with acute inferior myocardial infarction is a common electrocardiogram finding, its significance is not yet established. In this prospective study, the relationship between RSTD and the extent of coronary artery disease (CAD) was investigated. PATIENTS AND METHODS: One hundred eighty-eight patients with acute inferior myocardial infarction who received thrombolytic therapy were enrolled in this study. The magnitude and location of ST segment depression in noninfarcted leads and the maximum ST segment elevation (STEmax) in inferior leads were measured. All patients were divided into two main groups according to the presence of RSTD and five subgroups according to the location of RSTD, the maximum RSTD and the STEmax. The coronary angiography was performed in all patients 28 +/- 4 days after acute myocardial infarction. RESULTS: There were no significant differences in the proportion of coronary disease risk factors in patients with, versus those without, RSTD (P=0.6). Multivessel CAD was present in 63 of the 108 (58%) patients with RSTD and in 32 of the 80 (40%) patients with no RSTD (P=0.02). According to the location of reciprocal changes, multivessel disease was present in significantly more patients with anterior RSTD concomitant with or without lateral ST segment depression (P=0.01 and P=0.03, respectively); the proportion of single vessel disease was greater in patients with only lateral RSTD (P=0.02). In addition, the presence of anterior RSTD to a greater magnitude than the STEmax in inferior myocardial infarction increases the likelihood of multivessel disease (P=0.006). CONCLUSIONS: The presence of RSTD during an acute inferior myocardial infarction correlates with the presence of multivessel CAD and may not be only an electrical phenomenon.     

Serial evaluation of perfusion defects in patients with a first acute myocardial infarction referred for primary PTCA using intravenous myocardial contrast echocardiography.

AIMS: To investigate whether myocardial contrast echocardiography using Sonazoid could be used for the serial evaluation of the presence and extent of myocardial perfusion defects in patients with a first acute myocardial infarction treated with primary PTCA, and specifically, (1) to evaluate safety and efficacy of myocardial contrast echocardiography to detect TIMI flow grade 0--2, (2) to evaluate the success of reperfusion and (3) to predict left ventricular recovery after 4 weeks follow-up. METHODS AND RESULTS: Fifty-nine patients underwent serial myocardial contrast echocardiography, immediately before primary PTCA (MCE1), 1 h (MCE2) and 12--24 h after PTCA (MCE3). A perfusion defect was observed in 21 of 24 patients (88%) with anterior acute myocardial infarction. All but one had TIMI flow grade 0--2 prior to PTCA. Nine of 31 patients (29%) with inferior acute myocardial infarction showed a perfusion defect and all had TIMI flow grade 0-2 prior to PTCA. Restoration of TIMI flow grade 3 was achieved in 73% of the patients by primary PTCA. A reduction in size of the initial perfusion defect of at least one segment (16 segment model) or no defect vs persistent defect in patients with anterior acute myocardial infarction was associated with improved global left ventricular function at 4 weeks; mean global wall motion score index 1.29+/-0.21 vs 1.66+/-0.31 (P=0.009). Multiple regression analysis in patients with an anterior acute myocardial infarction revealed that the extent of the perfusion defect at MCE3 was a significant (P=0.0005) independent predictor for left ventricular recovery at 4 weeks follow-up. The only other independent predictor was TIMI flow grade 3 post PTCA (P=0.007). CONCLUSION: Intravenous myocardial contrast echocardiography immediately prior to primary PTCA seems safe and is capable of detecting the presence of a perfusion defect and its subsequent dynamic changes, particularly in patients with a first anterior acute myocardial infarction. A significant reduction in size of the initial perfusion defect using serial myocardial contrast echocardiography predicts functional recovery after 4 weeks and these findings underscore the potential diagnostic value of intravenous myocardial contrast echocardiography.     

急性心肌梗死对应导联ST段变化与冠状动脉病变的关系

目的 用冠状动脉造影技术研究急性心肌梗死(AMI)对应导联ST段变化与冠状动脉病变的关系。方法136例急性心肌梗死共分五组:①组,前壁梗死(V1-6)伴有Ⅱ,Ⅲ,aVF导联ST段下移。②组,下壁梗死(Ⅱ,Ⅲ,aVF)同时伴有V1-6导联ST段下移。③组,下壁梗死(Ⅱ,Ⅲ,aVF)同时伴有I,aVL导联ST段下移。④组,前壁梗死(V1-6)未伴有其它导联的ST段变化。⑤组,下壁梗死(Ⅱ,Ⅲ,aVF)未伴有其它导联的ST段变化。所有患者均进行冠状动脉造影。结果 前壁心肌梗死伴有Ⅱ,Ⅲ,aVF导联ST段下移25例中有88%为左冠状动脉前降支病变,其中90.9%为左冠状动脉近端病变。前壁心肌梗死未伴有Ⅱ,Ⅲ,aVF导联ST段下移的36例患者中有94.4%为左冠状动脉前降支病变,两者统计无显著性差异。在下壁心肌梗死伴有V1-6导联ST段下移组22例中有81.8%为右冠状动脉病变,但同时伴有前降支病变的却有77.3%,其中单支病变仅18.2%。下壁心肌梗死未伴有V1-6导联ST段下移34例有91.2%为右冠状动脉病变,但同时伴有前降支病变的仅有32.4%,其中单支病变达52.9%。两组统计分别为P<0.001和P相似文献   

急性心肌梗死合并三度房室传导阻滞的预后及再灌注治疗的意义

目的分析急性心肌梗死合并三度房室传导阻滞(Ⅲ°AVB)患者的临床特征,探讨再灌注治疗对急性心肌梗死合并Ⅲ°AVB预后的意义。方法1992年~2005年连续入院的急性心肌梗死合并Ⅲ°AVB患者51例(Ⅲ°AVB组),每组选择前后相继入院的急性心肌梗死患者2例,共102例构成非Ⅲ°AVB组。比较两组基线临床资料、住院期间死亡率、并发症,以及再灌注治疗的差异。观察Ⅲ°AVB组12h内有效再灌注治疗的病例和未能再灌治疗的病例住院期间的转归。结果(1)与非Ⅲ°AVB组比较,Ⅲ°AVB组发病年龄较大,下壁或右心室梗死比例高,住院期间死亡、心室颤动、KillipⅣ级心功能、心源性休克发生率高,需要起搏治疗的例数多,两组差异有统计学意义。(2)Ⅲ°AVB组排除既往有心肌梗死史及合并其他全身疾病的病例5例,其余46例,17例发病12h内再灌注治疗,住院期间死亡1例,29例未再灌注治疗,死亡12例,P<0.02.。结论急性心肌梗死合并Ⅲ°AVB预后差,住院期间死亡率高。12h内再灌注治疗患者住院期间死亡例数相对较少,这种预后的差异是否有普遍意义,还需进一步研究。     

心电图Ⅱ Ⅲ、aVF导联病理性Q波对冠状动脉多支血管病变的判定价值

目的:探讨静息心电图II、III、a VF导联病理性Q波对冠状动脉多支病变的临床判定价值。方法:分析2006年3月2014年4月收治的冠心病患者1 007例,包括心肌梗死(MI)患者305例,根据心电图定位分为前壁MI组患者204例及下壁MI组患者101例,分析两组患者冠状动脉造影结果。结果:体表心电图病理性Q波评价冠状动脉多支血管病变患者的灵敏度为35.6%,特异度为83.0%,准确度为49.2%;前壁MI患者心电图病理性Q波评价冠脉多支病变的灵敏度(22.4%)高于下壁MI患者(13.2%)(P<0.01);下壁MI患者心电图病理性Q波评价冠脉多支病变的特异度(98.0%)高于前壁MI患者(85.1%)(P<0.01);在评价的准确度方面前壁(40.3%)与下壁MI患者(37.4%)无统计学差异。结论:II、III、a VF导联病理性Q波判断冠状动脉多支血管病变的灵敏度是前壁梗死高于下壁梗死,而特异度则是前壁梗死低于下壁梗死。