运动平板试验中收缩压异常反应的意义

目的:研究运动平板负荷试验(ETT)中收缩压异常反应的意义。方法:选择同时经ETT及冠状动脉造影(CAG)检查的可疑冠心病患者71例。分别用ST段偏移异常(公认指标)及收缩压反应异常(新指标)判断ETT结果,再分别与CAG结果进行统计学分析比较。结果:根据新指标判断的ETT阳性检出率与CAG的阳性率比较差异有统计学意义。结论:新指标不宜作为运动负荷试验阳性的独立判断指标。     

运动试验中血压与冠状动脉病变和血管活性物质的关系

目的：比较运动中收缩压（SBP）的反应与冠心病（CHD）患者冠状动脉病变特点和血管活性物质（VS）变化。方法：对41例冠状动脉造影证实的CHD患者根据运动中SBP变化分为3组：下降至少10mmHg者（A组,n=12）、升高≤50mmHg者（B组,n=16）和显著升高＞50mmHg者（C组,n=13）,放免法测定运动前后血浆内皮素、血管紧张素、血栓素、前列腺素和血小板膜糖蛋白变化。结果：A组冠状动脉病变积分高、心功能差,运动前VS浓度高;C组运动后VS浓度明显升高。结论：A组冠状动脉病变严重,静息时VS已处较高水平代偿状态;C组VS对运动呈高敏易激活,与SBP显著升高有关。     

运动试验收缩压恢复比对冠心病的诊断

目的 :探讨运动中收缩压恢复比 ( SPRR)异常对冠心病 ( CHD)诊断的价值。方法 :对1 50例患者进行活动平板运动试验并与冠状动脉造影对照。结果 :SPRR异常诊断的敏感性、特异性及准确性分别为 62 .0 %、96.0 %及 73.3% ,而 ST段压低则分别为 72 .0 %、86.0 %及 76.6%。结论 :CHD患者运动后引起 SPRR异常反应可预测冠状动脉病变。     

Preliminary study of abnormal increase of postexercise systolic blood pressure in the diagnosis of coronary artery disease

Objectives This study sought to evaluate the diagnostic value of abnormal increase of postexercise systolic blood pressure (SBP)for detecting coronary artery disease (CAD) in patients with or without hypertension. Methods Treadmill exercise testing (TET) was conducted in 88 patients (40 CAD patients, 48 control subjects) with or without hypertension, each of whom underwent selective coronary angiography (CAG). The abnormal increase of postexercise SBP was defined as 10mmHg higher than earlier periods during the recover), phase (6 minutes)of exercise testing. Results The abnormal increase of postexercise SBP had higher sensitivity, specificity,and accuracy for detecting CAD than those of ST - segment depression in patients with or without hypertension. Its accuracy increased with the severity of CAD while decreased in patients with hypertension, and the increase value of SBP had a positive correlation with the extent of coronary artery lesion. The combination of ST - segment depression and abnormal increase of postexercise SBP diagnosed CAD most accurately in patients with hypertension. Conclusions Abnormal increase of postexercise SBP may be a useful index for diagnosing CAD.     

运动试验恢复期收缩压异常升高诊断冠心病的初步探讨

目的 探讨运动后收缩压异常升高对冠心病的诊断价值，以及高血压对其诊断准确性的影响。方法 88例先后行平板运动试验和冠脉造影的患，根据高血压的有无和冠脉造影结果分组。以运动后恢复早期6min内，收缩压后期比前期升高≥10mmHg为收缩压异常升高的阳性判定标准。结果 收缩压异常升高诊断冠心病的敏感性、特异性、准确性，高于ST段压低标准；其敏感性与冠脉病变程度成正比，其升高值亦与冠脉病变成正相关；在非高血压组其诊断的准确性较高，对合并高血压的患，两指标联用的诊断准确性最高。结论 运动后收缩压异常升高可作为诊断冠心病的一个有效指标。     

运动试验后收缩压异常升高对冠心病诊断价值的初步探讨

目的　评价运动试验恢复期收缩压异常升高对冠心病的诊断价值 ,以及高血压对其诊断准确性的影响。方法　观察了 80例先后行平板运动试验和冠状动脉造影的患者 ,根据高血压病的有无和冠状动脉造影结果分组 ,以运动试验后 6min内 ,收缩压后期比前期升高≥ 10mmHg(1mmHg =0 133kPa)为收缩压异常升高为阳性判定标准。结果　收缩压异常升高诊断冠心病的敏感性、特异性、准确性、阳性预测值和阳性似然比 ,高于ST段压低标准 ;其敏感性与冠状动脉病变程度成正比 ;对合并高血压的患者 ,两指标 (收缩压异常升高和ST段压低 )联用可显著提高诊断的特异性和阳性预测值。结论　运动试验恢复期收缩压异常升高可作为诊断冠心病的一个有效参考指标     

平板运动试验诊断冠心病阳性指标的比较研究

目的：探讨ST、ST／HR及QTd在平板运动试验试验中的变化及对冠心病心肌缺血的诊断价值。方法：56例临床诊断或疑诊为冠心病的病人先后行平板运动试验及冠状动脉造影检查，并进行比较分析。结果：ST、ST／HR、QTd及ST ST／HR QTd诊断冠心病的准确性分别为：52％、64％、66％、84％。结论：运动试验中诊断冠心病心肌缺血的敏感性和准确性最高的指标为ST ST／HR QTd。     

平板运动试验中IQTd诊断冠心病的价值

目的　评价用心率调整QTd指标 (IQTd)在平板运动试验中对冠心病的诊断价值。方法　 4 3例患者在冠状动脉造影前行平板运动试验 (ETT) ,测量其运动前、运动中与ST段下移最大时或最大负荷心率时 (无ST段下移者 )QTd、校正QTd(QTdr、QTcdr、QTdp、QTcdp) ,分别计算IQTd和IQTcd。ETT后 1周内行冠状动脉造影 (CAG) ,根据CAG结果分为冠心病 (CAD)组 2 3例和冠状动脉正常 (NCAD)组 2 0例。结果　运动前的QTdr和QTc dr在CAD与NCAD组间无显著差别。在冠状动脉正常组 ,运动过程QTdp和QTcdp无显著增加 ,而在冠心病组QTdp和QTcdp有显著性增加 (P <0 0 0 1)。在运动过程中 ,QTdp、QTcdp、IQTd、IQTcd在CAD与NCAD组间有明显差异。在NCAD组QTdp、QTcdp、IQTd、IQTcd95 %上限值分别为 74ms、86ms、0 .17ms/bpm和0 2ms/bpm。用其界值作为诊断标准 ,其特异性显著高于ST段压低 ,IQTd和IQTcd的敏感性和准确性显著高于ST压低 (P <0 0 5 )。结论　提示IQTd、IQTcd可作为平板运动试验中诊断冠心病敏感、准确和特异的指标     

Usefulness of the postexercise response of systolic blood pressure in the diagnosis of coronary artery disease

The normal decline in systolic blood pressure (SBP) during the recovery phase of treadmill exercise does not occur in some patients with coronary artery disease (CAD). In others the recovery values of SBP exceed the peak exercise values. To examine the diagnostic value of this observation, we studied 31 normal subjects and 56 patients undergoing treadmill exercise before coronary cineangiography. Because of large differences in peak exercise pressures between the two groups, recovery ratios were derived by dividing the SBP at 1, 2, and 3 min after exercise by the peak exercise SBP. The 1, 2, and 3 min ratios in the normal subjects declined steadily from 0.85 +/- 0.07 (SD) to 0.79 +/- 0.06 and to 0.73 +/- 0.06, respectively, while the ratios in the patients with CAD remained elevated at 0.97 +/- 0.12 to 0.97 +/- 0.11 to 0.93 +/- 0.13. With use of the upper limits defined by two SDs of the normal value, recovery ratios were compared with the occurrence of angina and with ST segment depression on the exercise electrocardiogram in the patients with CAD. Abnormal ratios were more frequent in patients with CAD (53/56, 95%) than in those with ST segment depression (33/56, 59%), angina (37/56, 66%), and either ST segment depression or angina (42/56, 75%). Twenty of the patients with CAD who were on no medication underwent an additional treadmill exercise test on a separate day and no significant differences were found in the ratios from the two tests. Ten additional patients with CAD underwent treadmill exercise testing while on placebo and while on a beta-blocker.(ABSTRACT TRUNCATED AT 250 WORDS)     

Assessment of coronary artery disease in hemodialysis patients with delayed systolic blood pressure response after exercise testing

BACKGROUND: We evaluated usefulness of the postexercise systolic blood pressure (SBP) response for detecting coronary artery disease (CAD) in hemodialysis patients. METHODS: A treadmill exercise testing was done, and the SBP response was measured in 44 hemodialysis patients (30 men, 14 women; age 41 to 81 years). The postexercise SBP response was defined as the ratio of SBP after 3 minutes of recovery to SBP at peak exercise. RESULTS: The SBP ratio of the 25 subjects with coronary artery stenosis (1.01+/- 0.13) was significantly greater (p<0.01) than 19 subjects without coronary artery stenosis (0.83+/- 0.10). An SBP ratio greater than 0.92 identified CAD with higher sensitivity, specificity, and accuracy than did the conventional ST-segment depression criterion (76 vs. 56%, 90 vs. 53%, and 82 vs. 55%, respectively). CONCLUSION: Determination of the SBP ratio is a clinically useful, noninvasive method for accurately detecting CAD in hemodialysis patients.     

心电图平板运动试验阳性患者运动后收缩压恢复延迟与冠状动脉病变程度相关性研究

目的:探讨心电图平板运动试验阳性的患者,运动后收缩压恢复延迟与冠状动脉病变程度的相关性研究。方法:经症状限制性运动试验检查,并于30d内行冠状动脉造影患者。运动后收缩压恢复延迟定义为:运动后3min收缩压与运动后1min收缩压比值≥1.0,(即:收缩压恢复比值rSBPR3min/1min≥1.0)。冠状动脉病变程度的量化指标:应用杜克预后评分方法(分值范围0~100),将积分≥42确定为重度冠状动脉病变。入选164例年龄36~78岁,平均(57±8)岁,男性82%,重度冠状动脉病变患者73例(44%)。结果:收缩压恢复比值与冠状动脉病变严重程度杜克预后评分呈明显正相关(r=0.84,P<0.001)。二分类变量Logisitic回归分析,在调节运动SBP变化和临床情况等因素,收缩压恢复比值(rSBPR)仍能反映冠状动脉疾病严重程度OR=2.43(95%CI1.31~4.50)P=0.005。冠状动脉造影阳性组rSBPR较冠状动脉造影阴性组明显增高(P<0.05),但与是否合并高血压病无关(P>0.05)。结论:运动后收缩压恢复延迟与冠状动脉病变严重程度明显相关。     

平板运动试验QTc离散度的变化与冠心病诊断的关系

目的 探讨平板运动试验QTc离散度(QTcd)的变化规律与诊断冠心病的临床意义.方法 对50例疑诊为冠心病者先后行平板运动试验及冠状动脉造影检查,分析运动前、中、后同步十二导联心电图的QTcd.结果 冠心病组运动后QTcd较运动前显著增大[(77.18±13.91)和(45.42±11.40)ms];冠状动脉正常组运动前、后QTcd变化无显著性(P＞0.05).QTcd的变化规律反映了QTcd与冠心病心肌缺血呈正相关性.QTcd＞50ms 作为运动试验阳性标准,诊断冠心病的敏感性为95.2%,特异性为89.7%.传统运动试验标准诊断冠心病敏感性为95.2%,特异性为51.7%.结论 提示运动试验中QTcd＞50 ms可作为判断冠心病的心电学指标之一,且能提高特异性,减少假阳性.运动引起的单纯交感神经兴奋并不增加心肌复极的不均一性,只有在心肌缺血时交感神经兴奋才使QTcd增大.     

Head-to-head comparison of multislice computed tomography and exercise electrocardiography for diagnosis of coronary artery disease.

AIMS: To prospectively compare multislice computed tomography (MSCT) and exercise electrocardiography (ex-ECG) for diagnosis of coronary artery disease (CAD) with conventional coronary angiography as the reference standard. METHODS AND RESULTS: A consecutive cohort of 80 patients with suspected CAD was examined with MSCT using 16 x 0.5 mm detector collimation, ex-ECG, and conventional coronary angiography according to standard protocols. Results were compared using the paired McNemar's test, the chi(2) test, and 95%CIs. Both the sensitivity and specificity of MSCT [91% (40 of 44 patients, 95%CI 78-97%) and 83% (30 of 36 patients, 95%CI 67-94%)] were significantly higher (P = 0.039 and P < 0.001) than those for ex-ECG [73% (32 of 44 patients, 95%CI 57-85%) and 31% (11 of 36 patients, 95%CI 16-48%)]. The pairwise McNemar's test showed significant differences between MSCT and ex-ECG in the overall diagnosis in patients with suspected CAD (P = 0.036). The rate of non-diagnostic examinations was not significantly (P = 0.078) different between MSCT and ex-ECG [8% (6 of 80 patients, 95%CI 3-16%) vs. 19% (15 of 80 patients, 95%CI 11-29%)]. CONCLUSION: In this consecutive cohort of patients scheduled to undergo conventional coronary angiography, the performance of MSCT for diagnosis of CAD was superior to that of ex-ECG.     

冠心病患者平板运动试验中的血压反应及其临床应用价值

目的研究冠状动脉粥样硬化性心脏病(冠心病)患者平板运动试验中的血压反应,探讨舒张压增量作为运动平板试验阳性的辅助诊断依据的临床应用价值。方法选取2015年3月至2018年11月在南京医科大学附属老年医院进行平板运动试验(treadmill exercise testing,TET)检查的患者142例,根据患者有无冠心病及原发性高血压(高血压)分为单纯冠心病组40例、单纯高血压组50例和健康对照组52例,记录患者在TET中的血压变化。结果冠心病组患者与健康对照组之间的收缩压增量比较,差异无统计学意义(P>0.05);高血压组患者与健康对照组之间的收缩压增量比较,差异有统计学意义(P<0.05)。冠心病组患者与健康对照组的舒张压增量比较,差异有统计学意义(P<0.05);高血压组患者和健康对照组的舒张压增量比较,差异无统计学意义(P>0.05)。将舒张压增量作为冠心病的预测因子,结果显示TET中舒张压增量与冠心病之间显著相关。利用受试者工作特征曲线(receiver operating characteristic curve,ROC)描绘出的舒张压增量界值为5.5 mmHg(1 mmHg=0.133 kPa),其敏感性为0.850,特异性为0.615,曲线下面积为0.713。结论选取舒张压增量为5.5 mmHg在协助诊断冠心病方面具有一定的准确性,在辅助TET可疑阳性的患者诊断冠心病时有一定的临床应用价值。     

平板运动试验假阳性相关因素的分析

目的 探讨活动平板运动试验假阳性相关影响因素,调整观察参数,提高心电图活动平板运动试验评估冠脉病变的价值.方法 收集整理2012年1月至2014年6月因疑似冠心病在苏州九龙医院心脏中心接受活动平板运动试验、结果阳性的94例患者,所有患者均在平板运动试验后1w内行冠脉造影检查.根据造影结果将其分为真阳性组(A组)和假阳性组(B组),对比分析两组各项临床资料及活动平板试验数据.结果 真阳性组和假阳性组在性别、最大运动耐量(Mets)、运动峰值、心率收缩压乘积方面有显著差异(p＜0.05),A组平板运动试验中最大心率与运动终止后2 min心率的差值显著低于B组;A组平板运动试验终止后3 min收缩压与运动终止1 min收缩压的比值、包含2个以上冠心病危险因子的例数明显大于B组(p＜0.05).结论 活动平板试验参数结合相关的临床资料、血流动力学相关参数,能提高冠脉病变的诊断准确性,对临床诊断冠心病、评估治疗效果和预后等方面可提供有价值的参考.     

平板运动试验后心率恢复情况对冠心病的诊断价值

目的评价平板运动试验后心率恢复的意义及其对冠心病的诊断价值。方法76例拟诊冠心病患者行平板运动试验,根据冠状动脉造影结果分为冠心病组和非冠心病组。计算运动后1、2、3、4、5、7min心率恢复值并比较,利用运动后心率恢复异常作为诊断冠心病标准与传统的ST段压低法比较。结果冠心病组的患者运动后各时段心率恢复值均低于非冠心病组。以运动后1、2min心率恢复异常作为诊断冠心病的标准,与传统的ST段压低法相比,其敏感性无差别,特异性较高。结论冠心病组与非冠心病组比较表明,运动后心率恢复存在明显差异,且运动后心率恢复异常可以作为诊断冠心病的方法之一。