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second harmonic technique
相关语句
  二次谐波
     Objective To detect coronary sinus flow reserve by transthoracic Doppler echocardiography(TTDE) with second harmonic technique and evaluate the coronary sinus flow velocity reserve (CSFR)in comparison to transesophageal echocardiography(TEE)analysis.
     目的应用经胸二次谐波多普勒超声心动图(TTDE)检测冠状静脉窦血流储备(CSFR); 与经食道多普勒超声心动图(TEE)探测左冠状动脉前降支血流速度计算血流储备(CFR)相对照,分析研究经胸探测冠状静脉窦血流储备(CSFR)可代替TEE的探测CFR可靠性。
短句来源
     Objective ① To assess the feasibility of detecting coronary flow by contrast enhanced transthoracic Doppler echocardiography (TTDE) with second harmonic technique.
     目的 ①探讨经胸声学造影二次谐波多普勒超声心动图 (TTDE)探测冠状动脉左前降支(LAD)远端血流的可行性 ;
短句来源
     Objective To assess the value of myocardial contrast echocardiography(MCE)with intermittent second harmonic technique and sulfur hexafluoride microbubbles(SonoVue)in evaluating myocardial microcirculation in acute myocardial ischemia and myocardial infarction.
     目的采用氟硫微泡声学造影剂SonoVue及间歇二次谐波技术,探讨经静脉心肌声学造影(MCE)评价急性缺血及心梗心肌微循环灌注的价值。
短句来源
     Objective: To assess the value of myocardial contrast echocardiography (MCE) with intermittent second harmonic technique and perfluorocarbon microbubbles in identifying myocardial ischemia and infarction.
     目的 :采用氟碳微泡声学造影剂及间歇二次谐波技术 ,评价心肌声学造影 (MCE)在缺血、梗死心肌诊断中的价值。
短句来源
     New noninvasive method for the evaluation of coronary flow velocity reserve:contrast-enhanced transthoracic Doppler echocardiography with second harmonic technique
     新型无创性冠状动脉血流储备检测经胸壁声学造影二次谐波多普勒技术
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  “second harmonic technique”译为未确定词的双语例句
     Methods CFVR was assessed by contrast enhanced TTDE with second harmonic technique in distal left ascending coronary artery (LAD) in 110 patients.
     方法 利用TTDE连续检测 110例患者LAD血流。
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  相似匹配句对
     Second .
     二、破自造论。
短句来源
     Second,
     二是对于?
短句来源
     On the Nondiffvacting Second Harmonic Beam
     非衍射的二次谐波
短句来源
     THE DIFFRACTION AND WALKOFF IN THE SECOND HARMONIC GENERATION
     二次谐波转换中的衍射和离散效应
短句来源
     The second part: The application of the harmonic technique in his works.
     第二部分:陈培勋作品的和声手法运用。
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  second harmonic technique
Doppler signal quality was evaluated in the first 46 patients by use of intravenous Levovist infusion and second harmonic technique.
      


Objective ① To assess the feasibility of detecting coronary flow by contrast enhanced transthoracic Doppler echocardiography (TTDE) with second harmonic technique. ② To evaluate the coronary flow velocity reserve (CFVR) in comparison to intracoronary Doppler flow (ICD) analysis.Methods CFVR was assessed by contrast enhanced TTDE with second harmonic technique in distal left ascending coronary artery (LAD) in 110 patients. CFVR was calculated as the ratio of hyperemia to baseline average peak...

Objective ① To assess the feasibility of detecting coronary flow by contrast enhanced transthoracic Doppler echocardiography (TTDE) with second harmonic technique. ② To evaluate the coronary flow velocity reserve (CFVR) in comparison to intracoronary Doppler flow (ICD) analysis.Methods CFVR was assessed by contrast enhanced TTDE with second harmonic technique in distal left ascending coronary artery (LAD) in 110 patients. CFVR was calculated as the ratio of hyperemia to baseline average peak velocity (APV). Results In 106 (96%) of 110 patients, CFVR was successfully determined with intravenous adenosine infusion. CFVR determined from TTDE correlated closely with those from ICD measurements (r= 0.83 , Y= 0.76 X+ 0.61 , P< 0.001 ).Conclusions TTDE is a feasible method and provides reliable data on CFVR which can be used for the assessment of coronary stenosis and follow up after coronary intervention.

目的 ①探讨经胸声学造影二次谐波多普勒超声心动图 (TTDE)探测冠状动脉左前降支(LAD)远端血流的可行性 ;②与冠状动脉内多普勒 (ICD)相对照 ,分析研究LAD冠状动脉血流储备(CFR)。方法 利用TTDE连续检测 110例患者LAD血流。冠状动脉血流速度储备 (CFVR)为注射腺苷后的最大平均血流速度与静息状态平均血流速度的比值。结果 CFVR探测的成功率为 96%。TTDE所探测的CFVR(2 .83± 0 .68)与ICD所探测的结果 (2 .91± 0 .74)密切相关 (r =0 .83 ,Y =0 .76X + 0 .61,P <0 .0 0 1)。结论 TTDE结合声学造影及二次谐波技术是一项可行、可信的无创性探测CFVR的方法 ,可用于冠状动脉病变的探测及冠脉介入治疗的随访。

Objective: To assess the value of myocardial contrast echocardiography (MCE) with intermittent second harmonic technique and perfluorocarbon microbubbles in identifying myocardial ischemia and infarction. Methods: Open-chest dogs were performed by intravenous MCE with perfluorocarbon microbubbles after 3 h of left anterior descending coronary artery (LAD) occlusion. The parameters of time-intensity curve were measured and compared between the normal and ischemic myocardial area at short-axis view of left...

Objective: To assess the value of myocardial contrast echocardiography (MCE) with intermittent second harmonic technique and perfluorocarbon microbubbles in identifying myocardial ischemia and infarction. Methods: Open-chest dogs were performed by intravenous MCE with perfluorocarbon microbubbles after 3 h of left anterior descending coronary artery (LAD) occlusion. The parameters of time-intensity curve were measured and compared between the normal and ischemic myocardial area at short-axis view of left ventricule midpapillary muscle level. The infarct size assessed by MCE was compared with the gross pathologic specimen stained with triphenyltetrazolium chloride(TTC).Results: The peak intensity(PI), T1/2,and area under curve(AUC) in the ischemic area were significantly different versus the normal area(13.5±1.9 vs 22.5±2.4;16.6±0.9 vs 9.7±0.5;231.6±14.9 vs 405.6±12.3, P ≤0.01). The percents of the no-flow area determined by MCE had correlation with those by TTC stain( r =0.89, P =0.01). Conclusion: Intermittent second harmonic MCE using intravenous injection of perfluorocarbon microbubbles could assess myocardial perfusion, diagnose ischemia, and define myocardial infarct size.

目的 :采用氟碳微泡声学造影剂及间歇二次谐波技术 ,评价心肌声学造影 (MCE)在缺血、梗死心肌诊断中的价值。方法 :建立开胸犬急性心肌梗塞动物模型 ,左前降支 (LAD)结扎 3h后 ,经静脉注射全氟显进行 MCE。于左室短轴乳头肌水平测定正常灌注区与缺血低灌注区心肌视频密度时间 -强度曲线参数及灌注缺损心肌范围。实验结束后心脏行组织学染色 ,比较两种方法所测的左室梗死心肌占左室心肌总面积百分比。结果 :心肌造影时间 -强度曲线中 ,正常灌注区与低灌注区的峰值强度 (PI)、强度减半时间 (T1/ 2 )、曲线下面积 (AUC)参数差异有显著性(13.5± 1.9vs2 2 .5± 2 .4 ;16 .6± 0 .9vs9.7± 0 .5 ;2 31.6± 14.9vs4 0 5 .6± 12 .3,P≤ 0 .0 1)。MCE所测定的左室梗死心肌占左室心肌总面积百分比与组织学染色所测定的实际百分比呈正相关 (r=0 .89,P=0 .0 1)。结论 :经静脉注射氟碳微泡声学造影剂 ,运用间歇二次谐波 MCE可定量心肌血流灌注 ,诊断心肌缺血 ,准确测定心肌梗死范围。

Objective To evaluate the feasibility, safety and accuracy of detecting coronary flow velocity reserve(CFVR) by contrast enhanced transthoracic Doppler echocardiography(TTDE) with second harmonic technique Methods Doppler flow signal in the distal left anterior descending coronary artery (LAD) was assessed by contrast ehanced TTDE with second harmonic technique in 46 patients The following grade was used for color Doppler and pulsed wave(PW) Doppler signal quality: Grade I: flow mapping...

Objective To evaluate the feasibility, safety and accuracy of detecting coronary flow velocity reserve(CFVR) by contrast enhanced transthoracic Doppler echocardiography(TTDE) with second harmonic technique Methods Doppler flow signal in the distal left anterior descending coronary artery (LAD) was assessed by contrast ehanced TTDE with second harmonic technique in 46 patients The following grade was used for color Doppler and pulsed wave(PW) Doppler signal quality: Grade I: flow mapping not obtainable or of very poor quality; Grade II: not well defined, PW Doppler tracings incomplete; Grade III: optimal recording, well delineated with complete biphasic PW Doppler tracings of systolic and diastolic flow CFVR was calculated as the ratio of hyperemic average peak velocity(APVh) to baseline average peak velocity(APVb) Results The Doppler signal quality was significantly improved by use of the echocardiographic contrast agent(Levovist) The color and PW Doppler flow was not visible only in 1(2%) patients In 45(98%) of 46 patients, CFVR was successfully determined with intravenous Levovist infusion Heart rate increased, blood pressure decreased significantly after adenosine infusion, 60% patients experienced mild side effects APVb [(18 21±7 02) cm/s], APVh [(48 46± 10 94) cm/s] and CFVR(2 84±0 65) determined from TTDE were closely correlated with those from intracoronary Doppler measurements [(APVb:(20 37±10 72) cm/s, APVh:(53 39±21 42) cm/s, CFVR:2 86±0 74] Conclusion TTDE is a feasible, safe method and provides reliable data on CFVR which can be used for the assessment of coronary stenosis, coronary microcirculation and for follow up after coronary intervention

目的 研究经胸壁声学造影二次谐波多普勒超声心动图探测左前降支 (LAD)冠状动脉血流储备 (CFVR)的可行性、安全性及可靠性。方法  46例患者经静脉注射利声显 ,利用二次谐波观察LAD血流 ,对多普勒血流图像质量进行分级。CFVR为注射腺苷后的最大平均血流速度与静息状态平均血流速度的比值。结果 CFVR探测的成功率为 98%。注射腺苷后 ,心率加快 ,血压减低。60 %患者有轻微副反应。CFVR为 2 84± 0 65 ,与冠状动脉内多普勒探测的结果密切相关 (r=0 87,P <0 0 0 1 )。结论 经胸壁声学造影二次谐波多普勒超声心动图可明显提高冠状动脉血流探测的成功率 ,是安全、可行、可靠的探测CFVR的方法

 
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