冠状动脉病变程度对左室功能的影响

目的　探讨冠心病患者冠状动脉病变程度与左室功能的关系。方法　 30 6例选择性冠状动脉造影 ,193例冠状动脉造影证实冠心病患者按病变程度、范围及Gensini积分分组 ,测定左室射血分数、短轴缩短分数、舒张早期充盈峰及舒张晚期充盈峰的最大峰值速度 ,并计算E/A比值。结果　冠状动脉轻度、中度病变、单支病变及Gensini积分小于 2 0分时 ,左室收缩功能改变不明显 (P >0 .0 5 ) ,舒张功能出现减退 (P <0 .0 5或P<0 .0 1)。收缩功能减退与受累血管数量、病变程度重及Gensini积分高有明显相关性。结论　冠心病患者左室舒张功能减退常先于收缩功能减退 ,舒张功能的异常是冠心病心功能受累早期改变的敏感指标     

冠状动脉粥样硬化程度与左室收缩功能的关系

目的：探讨冠状动脉粥样硬化程度与左室收缩功能之间的关系。方法：回顾性分析复旦大学附属中山医院心导管室的冠状动脉造影病例205例，将其冠脉病变程度按Gensini积分系统进行评定，将Gensini积分及各危险因素与短轴缩短分数，左室射血分数之间行二变量的Spearman相关性分析及控制影响Gensini积分与短轴缩短分数、左室射血分数相关的其它变量的偏相关分析，再将左室射血分数与Gensini积分及各危险因素作多元逐步回归分析。结果：Gensini积分与短轴缩短分数（r=一0．32，P〈0．01），左室射血分数（r=一0．33，P〈0．01）之间呈负相关，在控制了影响相关的其它变量后Gensini积分仍与短轴缩短分数（r=一0．26，P〈0．01），左室射血分数（r=一0．28，P〈0．01）之间呈负相关，多元逐步回归显示冠状动脉粥样硬化程度为左室收缩功能的独立影响因子（B=一0．378，P〈0．01）。结论：冠状动脉粥样硬化程度与左室收缩功能是独立相关的。     

Direct comparison of brain natriuretic peptide (BNP) and N-terminal pro-BNP secretion and extent of coronary artery stenosis in patients with stable coronary artery disease.

BACKGROUND: It is unclear whether coronary artery stenosis affects the secretion of N-terminal pro-brain natriuretic peptide (NT-proBNP) and brain natriuretic peptide (BNP) from the heart independent of ventricular dysfunction. Therefore, this study evaluated the relationship between BNP and NT-proBNP secretion, plasma levels and the severity of coronary artery stenosis in patients with stable coronary artery disease (CAD). METHODS AND RESULTS: Plasma levels of BNP and NT-proBNP in the aortic root (AO) and coronary sinus (CS) in 251 consecutive patients with stable CAD were measured. The transcardiac increase of NT-proBNP was significantly increased with the severity of coronary artery stenosis (p=0.012), but that of BNP was not (p=0.116). The molar ratio of the (CS-AO) NT-pro-BNP/(CS-AO) BNP increased with the severity of coronary artery stenosis (p=0.019) and decreased after coronary revascularization (p=0.018, n=36). Step-wise multivariate linear regression analyses were used to detect independent predictors of the (CS-AO) NT-proBNP among 10 variables including hemodynamic parameters and the Gensini score, which is a measure of the extent and severity of CAD. Among these variables, left ventricular ejection fraction (p<0.0001), left ventricular end-diastolic pressure (p=0.003) and log Gensini score (p=0.008) were significant independent predictors. CONCLUSION: These findings suggest that the transcardiac increase of NT-proBNP from the heart increases with the severity of coronary artery stenosis independent of hemodynamic overload, and plasma NT-proBNP may be superior to BNP to assess disease severity in CAD patients.     

Urinary 8-isoprostane levels can indicate the presence, severity and extent of angiographic coronary artery disease

BACKGROUND: Atherosclerotic coronary artery disease is the leading cause of death worldwide. Oxidative stress is one of the key elements in the pathogenesis of atherosclerosis. Isoprostanes are established markers of oxidative stress. The aim of this study was to investigate the association of urinary 8-isoprostane levels with the presence and severity of coronary artery disease (CAD) assessed by a validated scoring system. METHOD: Urinary 8-isoprostane levels were measured in 100 consecutive patients scheduled for coronary angiography. Extent and severity of CAD were assessed by modified Gensini scores. RESULTS: In patients with CAD, 8-isoprostane levels were higher (P < 0.001) than in patients without CAD (68.75 +/- 5.5 vs. 38.27 +/- 3.7 pg/ml). The levels of 8-isoprostane correlated with the number of risk factors (P < 0.001) and significantly increased in relation with the number of diseased vessels (P < 0.001). A significant (P < 0.001) correlation was found between 8-isoprostane levels and Gensini scores (r = 0.496), and a stepwise elevation in 8-isoprostane levels was observed across the increasing tertiles of the Gensini scores (P < 0.001). The multivariate logistic regression analysis revealed that 8-isoprostane was an independent predictor (odds ratio: 7.19 and P = 0.007) associated with angiographic CAD. CONCLUSION: These results confirm the role of oxidative stress in the atherosclerotic process. Urinary 8-isoprostane levels reflect the extent and severity of CAD and they may provide additional information for risk assessment in patients with suspected CAD.     

冠心病患者心率变异性及血浆同型半胱氨酸水平与冠脉病变程度有相关性

目的 探讨冠心病患者心率变异性(HRV)、血浆同型半胱氨酸(Hcy)水平与冠脉病变程度的相关性。方法 我院心内科住院冠脉造影确诊为冠心病患者278例,根据Gensini评分法将其分为冠状动脉狭窄轻度组（76例）、中度组（109例）和重度组（93例）。常规检测各组血浆Hcy水平,以及进行24h动态心电监测,并记录HRV指标,分析比较各组间HRV指标和血浆Hcy水平的差异以及分析HRV和血浆Hcy水平与冠脉病变严重程度之间的相关性。结果 Hcy水平随着Gensini评分值升高而升高,轻、中、重度3组间比较差异具有统计学意义(P<0.05);3组间SDNN、SDANN、rMSSD、PNN50、LF/HF等参数差异具有统计学意义(P<0.05),且随着冠脉病变程度的加重,HRV指标数值逐渐降低;Pearson相关分析显示SDNN,SDANN,rMSSD,pNN50,LF/HF与Gensini评分值呈负相关（均P<0.05）,Hcy与Gensini评分呈正相关（P=0.01）。Logistic多因素回归分析表明,Hcy、HRV是加重患者冠状动脉病变的独立相关因素。结论 冠心病患者HRV及血浆Hcy水平与冠脉病变程度有相关性。     

The effects of dyslipidemia on left ventricular systolic function in patients with stable angina pectoris.

Large-scale clinical trials have shown that long-term treatment with lipid-lowering therapy results in a significant reduction in the occurrence of heart failure among patients with coronary artery disease without previous evidence of congestive heart failure, suggesting dyslipidemia may have an adverse effect on left ventricular performance. To examine whether dyslipidemia has a detrimental effect on left ventricular systolic function and whether this effect is dependent on the corresponding severity of coronary atherosclerosis, 114 consecutive patients with stable angina and a positive exercise thallium-201 myocardial perfusion single-photon emission computed tomography were studied. All patients underwent measurement of serum lipid profiles, right-sided heart catheterization, left ventriculography, and selective coronary arteriography. Mean serum levels of total cholesterol and triglycerides were 4.5 and 1.4 mmol/l, respectively. In univariate analysis, a significant positive correlation between serum high-density lipoprotein (HDL) cholesterol and left ventricular ejection fraction (LVEF) (r = 0.49, P<0.0001) was found. Patients in the lower tertile of serum HDL cholesterol had a significantly lower mean LVEF than those in the upper tertile (55.9+/-15.2 vs. 72.8+/-6.8%, P<0.0001). Stepwise multiple linear regression analysis revealed that LVEF significantly correlated with HDL cholesterol (P<0.0001), the Gensini score (P = 0.008), and diabetes mellitus (P = 0.08) (r = 0.55, P<0.0001). In subgroup analysis of patients with angiographically normal coronary arteries, serum HDL cholesterol was still significantly associated with LVEF. The present study demonstrated an independent association between low HDL cholesterol and subclinical left ventricular systolic dysfunction in Chinese patients with stable angina whose serum levels of total cholesterol and triglycerides were relatively low. Moreover, this correlation remained significant even in patients with normal coronary angiograms, suggesting HDL cholesterol might influence left ventricular systolic performance through extra-atherosclerotic mechanisms.     

血清淀粉样蛋白A和血清淀粉样蛋白A-低密度脂蛋白复合物与冠心病的临床研究

目的探讨血清淀粉样蛋白A(SAA)和SAA-LDL复合物与冠状动脉病变程度和心肌缺血时心功能状态之间的关系。方法选择冠心病患者93例,行冠状动脉造影时根据Gensini评分进行分组:20分为A组(32例),20～40分为B组(30例),40分为C组(31例)。经冠状动脉造影排除冠心病者30例作为对照组。测定空腹血脂、血糖,采用ELISA法测定血清SAA和SAA-LDL复合物的水平。结果 Pearson相关和多元线性回归分析显示,Gensini评分与LVEF呈负相关,与血清SAA-LDL复合物水平呈正相关,与SAA、血脂、血糖水平不相关;LVEF与SAA-LDL复合物水平呈负相关,与SAA、血脂、血糖水平不相关。单因素方差分析显示,与对照组和A组比较,B组和C组lgSAA-LDL明显升高;与B组比较,C组lgSAA-LDL明显升高(P0.05);而对照组与A组lgSAA-LDL比较差异无统计学意义(P0.05)。结论血清SAA-LDL复合物比SAA更敏感地反映心肌缺血的严重程度及心肌缺血后心脏收缩功能的状态,严重的心肌缺血可导致左心室收缩功能障碍。     

同型半胱氨酸与冠脉病变程度及斑块的关系

目的探讨血浆同型半胱氨酸（Hey）水平与冠状动脉病变程度及斑块稳定性的关系。方法对200例可疑冠心病患者行冠状动脉造影,根据冠状动脉造影结果分为冠状动脉造影正常的对照组（54例）和冠心病组（146例）;冠心病组根据临床类型分为急性冠状动脉综合征组（ACS组,115例）和稳定型心绞痛组（SAP组,31例）。以Gensini积分评价动脉粥样硬化病变程度,以临床类型评价斑块稳定性。检查所有患者血浆Hcy、高敏C-反应蛋白（hs—CRP）等指标,分析Hey、hs—CRP与Gensini积分、斑块稳定性的关系。结果ACS组和SAP组Hcy水平均显著高于对照组[（28．8±6．5）mol／L比（10．2±4．1）mol／L,（16．3±5．7）mol／L比（10．2±4．1）mol／L,P均〈0．05],而且随着冠状动脉病变Gensini积分的增加而逐渐升高;ACS组Hey水平较SAP组高（P〈0．05）。结论冠心病患者血浆同型半胱氨酸水平与冠状动脉粥样硬化病变程度明显相关,且与斑块稳定性呈正相关。     

急性冠脉综合征患者并发焦虑障碍与冠状动脉狭窄严重程度的相关性

目的:探讨急性冠脉综合征(ACS)患者并发焦虑障碍患者焦虑评分与冠状动脉狭窄严重程度的关系。方法:180例ACS患者采用Zung焦虑自评量表(SAS)测试评分,分为焦虑组和非焦虑组,并行冠状动脉造影检查及心脏彩超检查测左室射血分数(LVEF),对冠状动脉病变狭窄程度进行Gensini评分,分析SAS评分与ACS患者冠状动脉病变评分(Gensini评分)的关系。结果:根据SAS评分将ACS患者分为无焦虑组82例,焦虑组98例(轻度焦虑54例,中度30例,重度14例)。焦虑组冠状动脉病变评分(Gensini评分)为(36±22)分,显著高于无焦虑组Gensini评分(25±13)分(P<0.01)。SAS评分与冠状动脉病变Gensini积分呈正相关(r=0.36,P<0.01)。结论:ACS患者焦虑障碍程度与冠脉病变狭窄程度相关。     

The association of elasticity indexes of ascending aorta and the presence and the severity of coronary artery disease

OBJECTIVES: To investigate the association between elasticity indexes of aorta and severity of coronary artery disease (CAD) in patients with stable CAD. METHODS: Fifty-six patients with CAD (CAD group) and 40 patients without CAD [non CAD (NCAD group)] were included in the study. Ascending aorta (Ao) diameters (mm) and Ao elastic indexes namely, Ao strain (AS), Ao distensibility (AD) were calculated from the echocardiographically derived Ao diameters and hemodynamic pressure measurements in all patients. Coronary angiography was performed in both CAD and NCAD groups. Severity of CAD was evaluated by using Gensini score index. RESULTS: Mean AD and AS measurements of CAD group were lower than that of NCAD group (P<0.001, for both). In CAD group, both AD and AS were associated with mean arterial blood pressure, presence of hypertension, Gensini score, left ventricle mass index, sex, and triglyceride levels in bivariate analysis (P<0.05, for all). CAD group's both AD (beta = -0.577, P = 0.003) and AS (beta = -0.494, P=0.021) were independently correlated with Gensini score in multiple linear regression analysis. The AD values of > or = 1.24 predict presence of low Gensini score (< or = 26 for this study) with sensitivity of 88.2% and specificity of 84.6% with area under the curve of 0.94; whereas the AS values of > or = 3.36 predict presence of low Gensini score with sensitivity of 82.4% and specificity of 87.2% with area under the curve of 0.873. CONCLUSION: Findings of this study have shown that AD and AS were independently associated with severity of CAD and that impaired elasticity indexes of the aorta might be independent predictors for the severity of coronary atherosclerosis.     

Aortic stiffness is an independent predictor of left ventricular function in patients with coronary heart disease

Although aortic stiffness plays an important role in patients with coronary artery disease (CAD), the influence of aortic stiffness on left ventricular systolic function has not yet been fully evaluated. In the present study, we measured brachial-ankle pulse wave velocity (baPWV), which is a new index of aortic stiffness, in patients with CAD (CAD group, n = 170, 67 +/- 9 years old) and without CAD (non-CAD group, n = 81, 63 +/- 8 years old), and evaluated the relationship between baPWV and left ventricular systolic function in patients with CAD. baPWV in the CAD group was significantly higher than that in the non-CAD group (1,794 +/- 350 vs. 1,469 +/- 292 cm/s, p < 0.05), although both systolic and diastolic blood pressure were comparable between the two groups. In the CAD group, the baPWV was higher in patients with three-vessel disease than that in patients with one-vessel disease (1,885 +/- 542 vs. 1,720 +/- 373 cm/s, p < 0.05). In the CAD group, multivariate analysis demonstrated that baPWV and pulse pressure independently correlated with left ventricular ejection fraction (LVEF). In conclusion, in patients with CAD, baPWV, which is a simple marker of aortic stiffness, increases with CAD severity and correlates with left ventricular systolic function independent of CAD severity.     

The effect of collateral circulation on left ventricular systolic function

BACKGROUND: Conflicting reports exist on the influence of coronary collateral circulation on preservation of left ventricular systolic function. The aim of this study was to assess the effect of coronary collateral circulation on left ventricular systolic function in coronary artery disease. METHODS: Seventy-one consecutive patients having left anterior descending arteries with proximal or near-proximal stenosis of at least 95% (excluding 100%) were included in the study. The coronary collateral circulation to left anterior descending artery was evaluated with regard to its effects on left ventricular systolic function. RESULTS: Among the 71 patients, 46 patients were found to have a coronary collateral circulation grade of >or=1 (group 1), whereas the remaining 25 patients had coronary collateral circulation grade of 0 (group 2). The mean value of left ventricular function score in group 1 was higher than that of group 2 (3.69+/-2.34 vs. 2.00+/-1.55, P=0.002), whereas the mean value of left ventricular ejection fraction in group 1 was lower than that of group 2 (44.67+/-12.05 vs. 54.32+/-10.22, P=0.001). The value of coronary collateral circulation grade was found to be positively correlated with the value of left ventricular function score (P=0.01, r=0.3), and negatively correlated with the value of left ventricular ejection fraction (P=0.01, r=-0.3). CONCLUSION: Coronary collateral circulation to the severely stenotic left anterior descending artery was not found to have an improving effect on left ventricular systolic function. In contrast with the previous studies demonstrating the coronary collateral circulation-associated preservation of left ventricular systolic function, presence of coronary collateral circulation was found to accompany or be associated with impairment of left ventricular systolic function. The grade of coronary collateral circulation was also found to be positively correlated with the severity of left ventricular systolic dysfunction. Further research on larger patient populations based on a long-term follow-up is warranted to investigate this issue.     

双源CT心周脂肪定量与冠状动脉病变特点及斑块类型的关系

目的本研究通过64排双源CT测定心周脂肪组织（PAT）体积,分析PAT体积与冠状动脉病变支数、病变部位、病变狭窄程度以及斑块类型之间的关系,以期探讨PAT体积对冠状动脉粥样硬化病变程度的预测价值。方法同期行64排双源CT和经皮冠状动脉造影检查的310例患者入选,进行腰围、体质指数（BMI）、空腹血生化测定。使用64排双源CT测定PAT体积、钙化积分和斑块类型。通过经皮冠状动脉造影检查明确冠心病诊断、病变支数、病变部位,并采用Gensini积分量化冠状动脉狭窄的严重程度。结果 （1）冠心病患者的PAT体积明显大于非冠心病患者（P=0.004）;急性冠脉综合征患者的PAT体积明显大于稳定性心绞痛患者（P=0.009）。（2）双支和三支病变患者PAT体积与单支病变患者相比,PAT体积明显增加（P〈0.001）。（3）Gensini积分随着PAT体积增大而增加。（4）多元线性逐步回归分析显示PAT体积、BMI、空腹血糖是影响Gensini积分的独立危险因素。（5）PAT体积与钙化积分具有明显正相关性（r=0.31,P〈0.001）。（6）混合型斑块的PAT体积最大,其病变节段积分明显高于其他类型（P〈0.01）。结论 PAT体积与冠心病的发生、冠心病分型、冠状动脉病变支数、钙化积分存在强的相关性,是影响Gensini积分的独立危险因素。     

空腹血糖与冠状动脉病变程度的相关性

目的探讨空腹血糖（FPG）水平与冠状动脉（下称冠脉）病变程度的相关性。方法回顾分析913例高度怀疑冠心病（CHD）而行冠脉造影的患者的临床资料,冠脉造影病变程度由是否诊断CHD、冠脉病变支数和冠脉病变Gensini总积分三方面表示。对FPG水平与冠脉病变程度进行单因素和多因素分析。结果FPG与冠脉病变程度密切相关：（1）Logistic回归结果显示FPG与冠脉有无病变显著相关（OR值1.462,95%CI为1.178~1.813,P〈0.01）;（2）多元逐步回归结果显示在校正了年龄、性别等因素之后,FPG与冠脉病变支数（r=0.164,P〈0.01）、冠脉病变总积分（r=0.088,P〈0.05）仍然独立相关。随着FPG的升高,冠脉病变支数增加。结论冠心病高危人群的FPG水平与冠脉病变程度密切相关,即使在糖尿病前期,随着FPG升高,冠脉病变程度也更加严重。     

稳定性冠心病患者循环内皮祖细胞与冠状动脉病变严重程度的分析

目的观察稳定性冠心病患者循环内皮祖细胞(EPCs)数量与冠状动脉病变严重程度的关系。方法对80例冠状动脉造影患者(排除急性冠状动脉综合征、心肌梗死)作病变严重程度及危险因素分析;以CD133/KDR作为EPCs标记物,用流式细胞仪检测患者的CD133/KDR双标记细胞数量。结果外周血EPCs数量与年龄、血清肌酐清除率(Ccr)、左室心肌重量指数(LVMI)呈负相关(P值分别=0.004,0.015,0.014);冠心病伴高血压患者较不伴高血压者EPCs数量显著减少(P=0.004)。冠状动脉造影阳性者EPCs数量较阴性者显著降低(P<0.01);EPCs数量与Gensini评分呈负相关(n=49,r=-0.305,P=0.039)。结论在稳定性冠心病患者循环EPCs数量与心血管危险因素及冠状动脉病变相关。     

血浆BNP水平与冠状动脉病变程度的相关性

目的 探讨血浆B型利钠肽（BNP）水平与冠状动脉病变程度的相关性.方法 选取冠脉造影检查者共458例作为研究对象,根据冠脉病变支数,分为1支病变组、2支病变组、3支病变组和冠脉造影正常的对照组（0支病变组）.冠状动脉病变程度由冠状动脉病变支数和Gensini积分表示,对BNP水平与冠脉病变程度进行单因素和多因素分析.结果 ①冠状动脉病变各组BNP水平显著高于正常对照组（P〈0.05或P〈0.01）,血浆BNP水平与冠状动脉病变程度呈正相关（r=0.736,P〈0.01）.②多元逐步回归分析结果 显示,在校正了年龄、高血压病史和高密度脂蛋白胆固醇（HDL-C）后,血浆BNP水平与冠状动脉病变总积分（r=4.763,P〈0.01）仍然独立相关,随着血浆BNP水平的升高,冠脉病变总积分增加.结论 冠心病患者的血浆BNP水平与冠脉病变程度密切相关,随着血浆BNP水平升高,冠脉病变程度加重.     

The effects of hyperhomocysteinemia on the presence,extent, and severity of coronary artery disease

Most cross-sectional and case-control studies indicate that an increased plasma total homocysteine (tHcy) level is an independent risk factor for coronary artery disease (CAD). However, this is still a controversial issue. Recently, it was reported that the level of tHcy is related to the extent and severity of CAD. This study was designed to investigate the relationship between plasma tHcy levels and the presence, extent, and severity of CAD. Three hundred and forty-one patients who underwent coronary angiography were included in the study. Of these patients, 195 had CAD and 146 had normal coronary arteries (control group). The mean tHcy level was found to be higher in patients with significant CAD (16.4 +/- 7.4 micromol/L vs 13.2 +/- 3.6 micromol/L, P < 0.001). This group also had a higher rate of hyperhomocysteinemia (HHcy) (22.6% vs 5.5%, P < 0.001). There were positive relationships between tHcy levels and male gender (P = 0.03, r = 0.16), smoking (P < 0.001, r = 0.19), hyperlipidemia (P = 0.006, r = 0.15), and hypertension (P < 0.001, r = 0.20). Using regression analysis HHcy was determined to be an independent risk factor for CAD (OR = 3.69, CI 95% 1.51-9.06, P = 0.004). However, HHcy was not an independent risk factor in patients with low cardiovascular risk profiles. There was no relationship between the level of tHcy and the severity, extent, and vessel scores of CAD. On the other hand, age and diabetes mellitus were related with all scores of CAD. In conclusion, although hyperhomocysteinemia is an independent risk factor for CAD in our region, it appears to be unrelated to the extent and severity of the disease.     

Homocysteinemia and coronary artery disease: a case-control study in a Tunisian population

We have determined the prevalence of hyperhomocysteinemia and tested its relationship with coronary heart disease in Tunisian patients. The study included 70 angiogrphically proven coronary patients and 140 age- and sex-matched healthy subjects. Plasma homocysteine folate and vitamin B12 were analyzed by immunoenzymatic methods. Hyperhomocysteinemia was considered for plasma homocysteine concentration >17 micromol/L. Mean plasma homocysteine concentration and hyperhomocysteinemia prevalence were significantly (p<0.001) higher in patients (16.3 +/- 7.9 micromol/L and 29%) than controls (12.6 +/- 4.0 micromol/L and 10%). The association between hyperhomocysteinemia and coronary heart disease persisted after adjusting on main cardiovascular risk factors (multi adjusted odds ratio, 2.99; 95% CI, 1.18-7.59; p=0.02). No association was observed between hyperhomocysteinemia and coronary disease severity and extent. This study showed an independent association between hyperhomocysteinemia and coronary heart disease, suggesting a role of hyperhomocysteinemia in atherothrombogenesis. However, causal relationship is not yet established. Until results of homocysteine-lowering therapy trials become available, hyperhomocysteinemia should be researched and treated in coronary heart disease patients.     

无创左心室压力-应变环定量评价冠心病患者冠状动脉狭窄

目的 探讨无创左心室压力-应变环（LVPSL）对冠状动脉不同程度狭窄的冠心病（CAD）患者心肌做功的评价。 方法 回顾性选择2019年12月～2021年10月就诊于湖南中医药高等专科学校附属第一医院心血管内科临床诊断为疑似CAD且行冠状动脉造影检查的患者130例,所有患者均行常规超声心动图、二维斑点追踪（2D-STI）和LVPSL检查。根据冠状动脉造影结果将其分为冠状动脉无狭窄组（n=33）,冠状动脉有狭窄组（n=97）。依据冠状动脉Gensini评分将冠状动脉有狭窄组分为三个亚组,轻度狭窄组（Gensini评分<25,n=37）,中度狭窄组[Gensini评分（25～50）,n=32],重度狭窄组（Gensini评分>50,n=28）。采集常规超声心动参数的同时,取左心室心尖四腔心、三腔心、两腔心切面三个心动周期在二维斑点追踪（2D-STI）模式下获得左心室整体纵向应变（GLS）。输入实时血压,进入LVPSL模式,可获得左心室整体做功指数（GWI）、整体有效做功（GCW）、整体无效做功（GWW）和整体做功效率（GWE）参数。比较不同程度冠状动脉狭窄对心肌做功的影响。 结果 与冠状动脉无狭窄组相比,冠状动脉轻度狭窄组GLS的减低、GWI减低、GCW减低、GWE减低和GWW增加（均P<0.01）;冠状动脉中度狭组GLS减低、GWI减低、GCW减低、GWE减低和GWW增加（均P<0.01）;冠状动脉重度狭窄组GLS减低、GWI减低、GCW减低、GWE减低和GWW增加（均P<0.01）。与冠状动脉轻度狭窄相比,冠状动脉中度狭窄组GLS减低、GWI减低、GCW减低、GWE减低和GWW增加（均P<0.01）;冠状动脉重度狭组GLS减低、GWI减低、GCW减低、GWE减低和GWW增加（均P<0.01）;与冠状动脉中度狭窄相比,冠状动脉重度狭窄组GLS减低、GWI减低、GCW减低、GWE减低和GWW增加（均P<0.01）。冠状动脉狭窄组的Gensini评分与GLS的绝对值、GWI、GCW、GWE呈负相关（r=?0.554, ?0.661, ?0.619, ?0.829）,与GWW呈正相关（r=0.718）,其中与GWE的相关性最高。 结论 LVPSL技术测得的GWI、GCW、GWE和GWW可定量分析不同程度冠状动脉狭窄的CAD患者心肌做功情况,心肌做功参数GWE与Gensini评分的相关性最高。     

P-wave dispersion in patients with stable coronary artery disease and its relationship with severity of the disease

AIM: P-wave dispersion (PD) has been reported to be associated with inhomogeneous and discontinuous propagation of sinus impulses. The purpose of this study was to investigate the PD in patients with stable coronary artery disease (CAD) and to determine its relationship with severity of the disease. METHODS: We prospectively analyzed 66 subjects with normal coronary angiogram (group 1) and 68 patients with significant (> or =50%) coronary stenosis; 25 had 1-vessel disease (group 2), 27 had 2-vessel disease (group 3), and 16 had 3-vessel disease (group 4). The maximum and minimum P-wave duration (Pmax and Pmin) and PD were measured from the 12-lead surface electrocardiogram. Echocardiographic examination was also performed. Angiographic vessel score and Gensini score were used to evaluate the severity of CAD. RESULTS: Pmax was longer in groups 3 and 4 compared with group 1 (P = .001 for both comparison). PD was greater in groups 2, 3, and 4 compared with group 1 ( P < .001 for all comparison), and also in group 4 compared with group 2 (P = .001). However, there was no statistically significant difference among the groups regarding Pmin. In bivariate correlation, increased PD was correlated with presence of hypertension (r = 0.278, P = .013), left ventricular ejection fraction (r = -0.231, P = .044), left atrial diameter (r = 0.223, P = .032), presence of moderate to severe mitral regurgitation (r = 0.284, P = .017), vessel score (r = 0.465, P < .001), and Gensini score (r = 0.338, P = .005). Multiple linear regression analysis showed that only vessel score was independently associated with PD (beta = .471, P = .01). CONCLUSIONS: PD was found to be greater in patients with stable CAD than in controls and to be associated with severity of the disease.