急性心肌梗死后硝酸甘油介入心肌显像预测血管重建术后心肌灌注改善的研究

目的 :探讨硝酸甘油介入心肌显像预测急性心肌梗死血管重建术后心肌灌注改善的准确率。方法 :对 2 4例急性心肌梗死患者进行 7天或 11天随访行硝酸甘油介入99m锝—甲氧基异丁基异腈 (99mTc MIBI)心肌显像与经皮冠状动脉腔内成形术 (PTCA)。采用肉眼观察法与放射性计数法进行预测血管重建术后心肌灌注改善分析。术后 3个月随访复查静息99mTc MIBI心肌显像 ,作为判断硝酸甘油介入血管重建术后心肌灌注改善的金标准。结果 :硝酸甘油介入99mTc MIBI心肌显像肉眼观察法与放射性计数法对预测血管重建术后心肌灌注改善的敏感性分别为 5 7%与 65 % ,特异性各为 89%与 90 % ,准确率各为 66%与 73 % ,阳性预测值各为 91%与 93 % ,阴性预测值各为49%与 5 4%。结论 :硝酸甘油介入99mTc MIBI心肌显像是预测心肌梗死血管重建术后早期心肌灌注改善较为准确的方法。     

硝酸甘油介入99 mTc-MIBI心肌断层显像对存活心肌的评价

为评价硝酸甘油（NTG）介入99m锝-甲氧基异丁基异脯（99mTc－MIBI）心肌显像估测存活心肌的价值，对24例心肌梗死病人不同日行两种方案的99mTc－MIBI心肌显像：一种在静息状态进行，另一种在舌下含服NTG0．6mg后进行。8例经皮腔内冠状动脉成形术（PTCA）的病人术后2～4周随访了99mTc－MIBI静息显像。结果显示，99mTc－MIBI静息显像有118个心肌节段摄取正常，98个摄取异常（16个节段摄取减低，82个摄取严重减低），在98个摄取异常的节段中，NTG介入99mTc－MIBI显像有39个（39．80％）节段摄取增加。8例行PTCA的病人，NTG介入99mTC－MIBI显像证实为可逆性缺损的心肌节没有84．21％在PTCA后心肌灌注改善（存活心肌），而为NTG介入99mTc－MIBI显像证实为不可逆性缺损的心肌节段有88．24％在PTCA后心肌灌注无改善。NTG介入99mTc－MIBI显像预测存活心肌的准确性为86．11％。表明，NTG介入99mTc－MIBI心肌显像可提高缺血但存活心肌的检出率。     

冠状动脉腔内心电图与核素心肌显像识别存活心肌的对照研究

目的 　 对照研究冠状动脉腔内心电图 (intracoronaryelectrocardiogram ,IC ECG)与核素心肌显像在识别存活心肌中的准确性及实用性 ,观察IC ECG是否较核素心肌显像具有准确率高、简便易行等优点 ,并从心电学角度为临床判断存活心肌提供一个新的指标。　方法　 4 2例心肌梗死患者 (梗死后 2周～ 3个月 ) ,采用经皮冠状动脉腔内成形术 (PTCA)支架术前静脉滴注小剂量多巴酚丁胺 (3μg·kg- 1 ·min- 1 )时合用舌下含服硝酸甘油 (0 5mg) 99mTc MIBI心肌显像 ,与术后 3周静息99mTc MIBI心肌显像的对照观察多巴酚丁胺与硝酸酯合用预测存活心肌的准确度及安全性。所有患者于PTCA支架术中同步记录IC -ECG及体表心电图 ,观察、测算J点后 4 0ms处ST段改变。根据IC ECG的ST段改变将患者分为 2组 ,A组 :IC ECG在术中ST段抬高 >0 2mV ;B组 :IC ECG在术中ST段抬高 <0 2mV。以术后 3周时静息99mTc MIBI心肌显像识别存活心肌者为阳性对照 ,观察IC ECG的ST段改变是否能够预测存活心肌。　结果　PTCA支架术前静息99mTc MIBI心肌灌注显像共有 16 4个节段心肌摄取异常。药物介入99mTc MIBI心肌灌注显像及PTCA支架术后 3周静息99mTc MIBI心肌灌注显像放射性分布异常节段心肌血流灌注改善。以PTCA支架术后 3周为标准 ,药物     

硝酸甘油介入心肌断层显像在心肌存活评价的临床应用

本应用静息、硝酸甘油介入^99mTc—MIBI心肌血流灌注断层显像方法对20例不稳定型心毁痛患（其中8例有陈旧性心梗病史)PTCA术前术后进行自身对比分析，结果显示：20例患160个心肌节段中、静息显像异常积分为196(1分33个节段，2分20个节段，3分为41节段)，硝酸甘油介入显像及PTCA术后静息显像异常积分均较术前静息显像明显减少且两积分接近，分别为104和97分。术前患耆射血分数为44．5±12.6%，术后为56．4±16．3％，增加26．8%，结果提示核素心肌硝酸甘油介入心肌断层显像简便无创，客观准确，为心绞痛患PTCA术前选择适应症及术后评价疗效提供了有力手段。     

药物负荷试验核素心肌断层显像识别存活心肌

目的探讨药物多巴酚丁胺、硝酸异山梨酯负荷试验核素锝[^99mTc]甲氧异丁异腈（technetium [^99mTc] methoxy isobutyl isonitrile,^99mTc-MIBI）心肌断层显像识别存活心肌的价值。方法对48例陈旧性心肌梗死伴左心室收缩功能受损患者进行静息心肌^99mTc-MIBI心肌断层显像和多巴酚丁胺、硝酸异山梨酯负荷试验^99mTc-MIBI心肌断层显像,用半定量的方法将^99mTc-MIBI摄取进行评分,区分存活心肌和非存活心肌。结果^99mTc-MIBI显像判定,经皮冠状动脉介入术前存活心肌节段有279个．非存活心肌节段235个;经多巴酚丁胺加硝酸异山梨酯负荷后,心肌显像改善：轻度稀疏节段9个、中度稀疏节段24个、严重稀疏或缺损节段10个,共计43个节段显像改善,评分减少1分以上,存活心肌节段313个,非存活心肌节段201个。两组差异有统计学意义（P〈0．05）。经皮冠状动脉介入术后6个月,随访多巴酚丁胺加硝酸异山梨酯负荷后,心肌显像改善的32个节段发现,静息^99mTc-MIBI显像改善,另有8个受损节段正常化。多巴酚丁胺加硝酸异山梨酯负荷后心肌显像无变化的389个节段在经皮冠状动脉介入术后346个节段无变化。多巴酚丁胺加硝酸异山梨酯负荷心肌显像检测存活心肌的阳性预测值93％,阴性预测值89％。结论多巴酚丁胺加硝酸异山梨酯负荷后心肌显像对存活心肌的识别能够提高存活心肌的检出率。其阳性预测值和阴性预测值较好。     

单硝酸异山梨酯介入99mTc-MIBI再注射心肌断层显像评估心肌存活力

目的　评估静息 99m Tc- MIBI显像及单硝酸异山梨酯介入后 99m Tc- MIBI再注射显像在检测心肌梗死病人心肌存活力方面的差异。方法　对 46例心肌梗死患者进行 99m Tc- MIBI心肌断层显像以及单硝酸异山梨酯静脉介入后 99m Tc- MIBI再注射心肌断层显像。结果　静息 99m Tc- MIBI显像出现灌注异常节段为 30 4个 ,根据心肌放射性分布情况计分 ,平均得分为 1 5.1± 3.8。单硝酸异山梨酯介入 99m Tc- MIBI再注射显像灌注异常节段为 2 63个 ,平均得分为 1 0 .8± 1 .6,两者比较差异有显著性 (P<0 .0 1 )。结论　单硝酸异山梨酯介入 99m Tc- MIBI再注射显像与静息 99m Tc- MIBI显像比较可明显提高对存活心肌检测的灵敏度。     

硝酸甘油介入心肌断层显像在心肌存活评价的临床应用

本文应用静息、硝酸甘油介入~(99m)Tc—MIBI心肌血流灌注断层显像方法对20例不稳定型心绞痛患者(其中8例有陈旧性心梗病史)PTCA术前术后进行自身对比分析。结果显示:20例患者160个心肌节段中、静息显像异常积分为196(1分33个节段,2分20个节段,3分为41节段):硝酸甘油介入显像及PTCA术后静息显像异常积分均较术前静息显像明显减少且两者积分接近,分别为104和97分,术前患者射血分数为44.5±12.6％,术后为56.4±16.3％,增加26.8％.结果提示核素心肌硝酸甘油介入心肌断层显像简便无创,客观准确,为心绞痛患者PTCA术前选择适应症及术后评价疗效提供了有力手段。     

心肌梗死患者梗死部位存活心肌对心绞痛发作的影响

目的 :探讨心肌梗死 (MI)患者梗死部位存活心肌对心绞痛发作的影响。方法 :6 3例Q波MI患者分别行静息、硝酸甘油 (NTG)介入99mTc MIBI心肌灌注显像 ,评价梗死部位的存活心肌。结果 :① 6 3例MI患者的 5 6 7个心肌节段中 ,静息心肌显像共有 2 39个节段 (4 2 .15 % )灌注异常 ,含服NTG 1.0mg后介入心肌显像 2 39个节段中有 97个节段得到改善 ,占总异常的 4 0 .5 8% ;②不稳定型心绞痛者存活心肌检出率为 5 9.80 % ,稳定型心绞痛者为 2 9.2 9% ,两者比较差异有显著性意义 (P <0 .0 1)。结论 :①硝酸酯类药物介入显像可以提高严重灌注缺损区存活心肌的检出率 ;②MI后 ,有心绞痛发作 ,提示有较多的存活心肌     

双核素心肌灌注显像对存活心肌判断

目的 :观察二硝酸异山梨醇酯 (isoket)介入后铊 2 0 1(2 0 1TI)和99mTc 甲氧基异丁基异腈 (MIBI)双核素心肌断层显像检测梗死后存活心肌的敏感性及两种核素间显像结果的一致性。方法 :将 4 0例陈旧性心肌梗死(OMI)患者 ,分为A(12例 )、B(16例 )及C(12例 )三组 ,A、B组分别进行isoket介入后2 0 1TI和99mTc MIBI单核素显像 ,C组进行isoket介入后2 0 1TI及99mTc MIBI双核素心肌显像。结果 :A组摄取2 0 1TI后出现不同程度的灌注异常节段共 6 5个 ,平均得分为 9.7± 1.2。B组摄取99mTc MIBI后出现不同程度的灌注异常节段共 87个 ,平均得分 10 .8± 1.6。C组以不同核素能窗双核素显像后结果2 0 1TI心肌显像检出灌注异常节段共 4 2个 ,平均得分 5 .8± 0 .6 ;99mTc MIBI心肌显像检出灌注异常节段共 4 8个 ,平均得分 6 .1± 0 .8。A组与B及C组两种结果比较 ,均P >0 .0 5。结论 :两种核素对梗死后心肌存活力的评估一致性良好 ;双核素心肌断层显像对梗死后心肌存活力的评估与单核素心肌断层显像是一致的 ,两种显像的结合可提高诊断的准确性     

099mTc—MIBI硝酸异山梨酯介入显像对冠脉支架置入术后心肌血流灌注的评估

目的：探讨99mTc锝-甲氧基异丁基异腈（99mTc—methoxyisobutyl isonitrile,Tc—MIBI）评估冠状动脉支架置入术（支架置入术）后损伤区心肌细胞血流灌注状况的价值。方法：40例行支架置入术患者,分别在置入术前、后进行99mTc—MIBI心肌静态显像及其硝酸异山梨酯（ISDN）介入显像,对比分析损伤区心肌细胞血流灌注改善程度。结果：40例患者冠状动脉共有360个节段。术前Tc—MIBIISDN介入显像异常10g个节段（29．2％）,显著少于Tc—MIBI静态显像异常的178个节段（49．4％,P〈0．01）。支架置入术后ISDN介入显像异常91个（25．3％）节段也显著少于静态显像异常的112个节段（31．1％,P〈0．05）。结论：99mTc—MIBI—ISDN介入显像较99mTc—MIBI心肌静态显像更能反映支架置入术后心肌血流灌注情况。     

小剂量多巴酚丁胺超声心动图与硝酸甘油介入~(99m)Tc-MIBI的心肌灌注显像估测存活心肌

目的　探讨小剂量多巴酚丁胺超声心动图 (LDDE)与含服硝酸甘油 (NTG)介入99mTc 甲氧基异丁基异睛 (MIBI)的心肌灌注显像在心肌存活估测中的价值。方法　对 17例心肌梗死患者分别行静息 NTG介入99mTc MIBI和小剂量多巴酚丁胺超声心动图的检查 ,经皮冠状动脉腔内成形术或冠状动脉旁路移植术后一个月重复基础超声心动检查 ,并进行对比分析。结果　 17例患者于基础超声心动检查 ,共有 94个心肌节段运动异常 ,在其中 5 0个低动力心肌节段中 ,两种方法一致性节段 2 9个 (5 8% ,P >0 .0 5 ) ;在 44个无动力心肌节段中两种方法一致性节段 16个 (36 % ,P<0 .0 5 )。两种方法对低动力心肌节段功能恢复的预测差异无显著性意义 (P>0 .0 5 ) ;而对无动力心肌节段 ,LDDE较NTG介入 99m　Tc MIBI心肌灌注显像有较高的特异性 (90 .9%vs 6 4.7% ,P <0 .0 5 )和较低的敏感性 (6 3.6 %vs88.9% ,P <0 .0 5 )。对整个运动障碍节段功能恢复的预测 ,LDDE较NTG介入99mTc MIBI心肌灌注显像有较高的特异性 (87.2 %vs 6 8.2 % ,P <0 .0 5 )。结论　两种方法对低动力心肌节段的预测有良好的一致性 ,LDDE对整个运动障碍节段功能恢复的预测有较高的特异性。     

Dipyridamole stress echocardiography and ultrasonic myocardial tissue characterization in predicting myocardial ischemia, in comparison with dipyridamole stress Tc-99m MIBI SPECT myocardial imaging

The purpose of this study was to validate whether dipyridamole stress ultrasonic tissue characterization with cyclic variation of integrated backscatter (CVIBS) compared with dipyridamole stress echocardiography and dipyridamole stress Tc99m-MIBI SPECT myocardial perfusion scintigraphy could predict myocardial ischemia in patients with chronic coronary artery disease. Twenty patients (16 M, 4 F) who had coronary angiography for stable angina pectoris were included in the study. Mean age was 62 +/- 8 years. The left ventricle was divided into 16 segments. Regional wall motion analysis and CVIBS measurements were obtained from 16 myocardial segments at rest and after dipyridamole (0.84 mg/kg) infusion. After 10 minutes, Tc-99m MIBI (10 mCi) was injected and SPECT myocardial imaging was performed. After 3 hours, 25 mCi Tc-99m MIBI was reinjected and rest images were obtained. A total of 320 ventricular wall segments were evaluated. Two hundred and six ventricular wall segments were supplied by stenotic coronary arteries and 114 segments were supplied by normal coronary arteries. Dipyridamole stress Tc-99m MIBI SPECT studies showed abnormal myocardial perfusion in 176 segments and normal perfusion in 144 segments. Transient regional wall motion abnormality was detected in 116 segments. A significant decrease in CVIBS after dipyridamole stress was detected in 184 segments. The sensitivity and specificity of dipyridamole stress echocardiography, Tc-99m MIBI SPECT, and CVIBS were 56% and 100%, 85% and 92%, and 89% and 100%, respectively, compared with the results from coronary angiography. Dipyridamole stress ultrasonic tissue characterization with CVIBS may provide more sensitive detection of myocardial ischemia than dipyridamole stress echocardiography and may be as valuable as dipyridamole stress myocardial perfusion scintigraphy.     

The value of myocardial contrast echocardiography compared with SPECT in detecting myocardial perfusion abnormalities in patients with anterior acute myocardial infarction

BACKGROUND: Microvasculature damage after myocardial infarction (MI), known as "no-reflow" phenomenon, may occur in some patients with acute MI in spite of invasive treatment and opened infarct-related coronary artery. There are several non-invasive and invasive methods used for the coronary flow assessment at the tissue level. AIM: To compare the value of intravenous contrast echocardiography (MCE) in detecting myocardial perfusion defects in patients with acute MI with (99m)Tc MIBI SPECT study. METHODS: Sixteen patients (11 males, 5 females, mean age 55.4+/-10.2 years) underwent primary coronary angioplasty or facilitated angioplasty (with reduced dose of a fibrinolytic drug and glycoprotein IIb/IIIa inhibitor) (PCI) for acute anterior MI. TIMI grade flow, TIMI Myocardial Perfusion Grade (TMPG), corrected TIMI frame count (cTFC), wall motion score index (WMSI) and segmental perfusion by myocardial contrast echocardiography (MCE) were estimated in real time before and immediately after PCI. MCE was repeated on the third day after PCI. All patients underwent (99m)Tc MIBI SPECT study (SPECT) while at rest on the third day after PCI. The area at risk was defined as the number of segments with no perfusion before angioplasty. Reflow was defined as an increase in contrast score in the same segments after angioplasty. RESULTS: Baseline MCE showed 95 segments with perfusion defects. Immediately after PCI, 77 segments were found with perfusion defect; in 10 patients improvement of myocardial perfusion was observed whereas in 6 patients perfusion defect remained unchanged. On the third day further improvement was observed in 8 patients. The number of segments with perfusion defect decreased to 53. SPECT detected perfusion defect in 54 segments. The agreement between MCE and SPECT for detecting perfusion abnormality was 98% (kappa 0.94). CONCLUSIONS: MCE is a safe technique for detecting myocardial perfusion in patients with acute MI. MCE proves that both primary and facilitated angioplasty improve myocardial perfusion in two thirds of patients with acute MI. Serial MCE allows identification of patients with both early and late improvement of myocardial perfusion. There is a very strong correlation between MCE and SPECT in the assessment of perfusion defects.     

Comparison of electrocardiographic-gated technetium-99m sestamibi single-photon emission computed tomographic imaging and rest-redistribution thallium-201 in the prediction of myocardial viability

Although the combined assessment of perfusion and function using rest electrocardiographic (ECG)-gated technetium-99m (Tc-99m) sestamibi single-photon emission computed tomographic (SPECT) imaging has been shown to improve sensitivity and accuracy over perfusion alone in the prediction of myocardial viability, no data are available comparing this technique with rest-redistribution thallium-201. Thirty patients with coronary artery disease and left ventricular dysfunction (ejection fraction < or = 40%) underwent rest-redistribution thallium-201 and rest ECG-gated Tc-99m sestamibi SPECT imaging before revascularization and rest ECG-gated Tc-99m sestamibi SPECT imaging at 1 or 6 weeks after revascularization. All thallium-201 and Tc-99m sestamibi images were interpreted by a consensus agreement of 3 experienced readers without knowledge of patient identity or time of imaging with Tc-99m sestamibi (before or after revascularization) using a 17-segment model. Concordance between techniques for the prediction of viability was 89% (kappa 0.556 +/- 0.109). With rest-redistribution thallium-201, sensitivity, specificity, positive predictive value, negative predictive value, and predictive accuracy were 95%, 59%, 88%, 78%, and 86%, respectively. With rest ECG-gated Tc-99m sestamibi SPECT imaging, sensitivity, specificity, positive predictive value, negative predictive value, and predictive accuracy were 96%, 55%, 87%, 80%, and 86%, respectively (p = NS vs rest-redistribution thallium-201). Although both techniques are comparable for detecting viable myocardium, rest ECG-gated Tc-99m sestamibi SPECT imaging allows direct assessment of both myocardial perfusion and ventricular function, which may be clinically useful in patients who require assessment of myocardial viability.     

Functional assessment with electrocardiographic gated single-photon emission computed tomography improves the ability of technetium-99m sestamibi myocardial perfusion imaging to predict myocardial viability in patients undergoing revascularization

This study evaluates the use of electrocardiographic (ECG) gated single-photon emission computed tomographic (SPECT) myocardial perfusion imaging for the prediction of viability in patients undergoing revascularization, who have coronary disease and left ventricular dysfunction. Fifty patients underwent technectium-99m (Tc-99m) sestamibi ECG gated SPECT imaging preoperatively at rest and 1 week after revascularization, whereas 36 (72%) also underwent imaging 6 weeks after revascularization. Images were interpreted by the consensus of 3 experienced readers without knowledge of patient identity or time of imaging (pre- or postrevascularization) for perfusion and wall motion using a 17-segment model. Results of perfusion alone were compared with perfusion and wall motion combined. One hundred five coronary artery territories were revascularized, 96 of which were viable and 9 nonviable. Perfusion alone predicted 87 to be viable and 18 nonviable (sensitivity 86%, specificity 55%, positive predictive value 95%, negative predictive value 28%, and overall accuracy 85%). Perfusion and wall motion combined identified 95 territories to be viable (sensitivity 95%; p <0.025; specificity 55%, positive predictive value 96%, negative predictive value 50%, and overall accuracy 91%; p <0.05). Thus, Tc-99m sestamibi ECG gated SPECT myocardial perfusion imaging at rest allows assessment of both perfusion and wall motion, which significantly improves the sensitivity and overall accuracy for determination of viability in comparison with perfusion alone.     

~(99)Tc~m-MIBI心肌显像在检测“罪犯”血管中的作用

目的　评价 99Tcm -甲氧基异丁基异腈 (MIBI)心肌灌注断层 (SPECT)显像在检测“罪犯”血管中的作用。方法　选择冠状动脉造影证实有多支血管病变并成功进行经皮腔内冠状动脉成形术 (PTCA)血流重建治疗的冠心病患者 5 2例。PTCA术前进行运动、静息、静脉滴注硝酸甘油介入 99Tcm - MIBI心肌显像 ,明确缺血与存活心肌数量最多的部位 ,以对应支配该部位的病变血管确定为“罪犯”血管。以术后疗效为标准 ,验证其准确性。结果　 5 2例中 ,冠状动脉造影发现病变血管 12 5支 ,心肌显像确定“罪犯”血管 5 2支。临床对确定的“罪犯”血管进行相应的血流重建治疗 ,随访均有良好疗效。结论　运动、静息、静脉滴注硝酸甘油介入 99Tcm- MIBI心肌显像检测“罪犯”血管准确可靠 ,实用可行     

Are technetium-99m-labeled myocardial perfusion agents adequate for detection of myocardial viability?

The noninvasive assessment of myocardial viability in patients with coronary artery disease and depressed left ventricular function has proven clinically useful for identifying those patients with ischemic cardiomyopathy who benefit most from coronary revascularization. Thallium-201 (²⁰¹T1) imaging at rest has been the radionuclide imaging technique most often utilized for distinguishing viable myocardium from scar. However, new technetium-99m (^99mTc) perfusion agents such as ^99mTc-sestamibi and ^99mTc-tetrofosmin have emerged as alternatives to ²⁰¹T1 for imaging of regional myocardial perfusion. Whether these new agents, which have better physical properties for imaging with a gamma camera than ²⁰¹T1, are valid for use in assessing myocardial viability is still uncertain. Recent clinical studies have demonstrated that these agents, when imaged using quantitative SPECT, can identify patients with myocardial hibernation who exhibit improved regional systolic function following revascularization. Experimental laboratory studies have shown that the uptake of ^99mTc-sestamibi and ^99mTc-tetrofosmin in ischemic myocardium is only slightly lower than the uptake of ²⁰¹T1. These ^99mTc-labeled agents remain bound intracellularly in mitochondria of viable myocytes under conditions of myocardial stunning and short-term hibernation, producing severe myocardial asynergy. With respect to determination of viability, the inferior wall region is at times problematic since attenuation of ^99mTc-sestamibi and ^99mTc-tetrofosmin is greatest in this area. Demonstration of preserved systolic thickening on ECG-gated SPECT images is indicative of viability in the instance of decreased regional ^99mTc counts due to attenuation and not scar. Administration of nitrates prior to tracer injection improves the sensitivity for identifying viable myocardial segments using rest imaging with ^99mTc-sestamibi or ^99mTc-tetrofosmin. Thus, it appears that the new ^99mTc perfusion imaging agents can be successfully employed for the determination of myocardial viability in the setting of severe regional dysfunction and chronic coronary artery disease. The greater the myocardial uptake of these agents in the resting state, the greater the probability of improved systolic function after coronary revascularization.     

Single-photon emission computed tomography in diagnosis of left ventricular post-infarction aneurysm

AIM: To assess value of single-photon emission computed tomography with (99m)Tc-sestamibi ((99m)Tc MIBI SPECT) for detection of post-infarction left ventricular aneurysm in patients with coronary artery disease. MATERIAL: Fifty nine patients were operated upon because of coronary heart disease. In 27 patients with post-infarction left ventricular aneurysm modified Dor operation (aneurysmectomy with endoventricular circular patch plasty reconstruction) was performed. In 24 patients with extended cardiosclerosis direct myocardial revascularization was conducted. RESULTS AND CONCLUSION: Comparison of (99m)Tc MIBI SPECT data obtained at rest and during dobutamine stress test revealed some diagnostic features characteristic of patients with left ventricular post-infarction aneurysm. Quantitative and qualitative assessment of viability of myocardium in basal and "borderline" zones influenced not only the volume of revascularization, it was important for preliminary determination of post-infarction left ventricular aneurysm resection level, selection of type of plasty, prognostication of complications in immediate and remote postoperative periods.