64层螺旋CT对冠状动脉起源异常及预后的评价

目的：探讨64层螺旋CT诊断冠状动脉起源异常的价值及对预后的评价。方法：对1211例冠状动脉CT血管成像（CTA）资料进行回顾性分析。结果：1211例完整冠状动脉CTA结果中，共检出冠状动脉起源异常18例，检出率为2.17%。包括右冠状动脉起源于左窦5例，伴前降支和回旋支单开口1例；右冠状动脉起源于升主动脉1例；圆锥动脉单开口4例；左冠状动脉主干起源于右窦3例；回旋支起源于右窦1例。前降支和回旋支单开口4例；共有8例冠状动脉分别起源于对侧窦，其中有3例该段有50%左右狭窄。结论：64层螺旋CT是冠状动脉起源异常安全和有效的确诊方法，并可对预后做出评估。     

双源CT在冠状动脉起源异常诊断中的应用2356例分析

目的探讨双源CT冠状动脉成像诊断冠状动脉起源异常的价值。方法对2 356例成人冠状动脉双源CT血管成像资料进行回顾性分析、总结。结果 2 356例冠状动脉CTA中,检查出冠状动脉起源异常31例,检出率为1.31%,其中冠状动脉开口水平变异9例,两支冠状动脉开口于左冠状窦5例,两支冠状动脉开口于右冠状窦8例,前降支起源于右窦1例,左回旋支起源于右窦2例,前降支及回旋支独立开口于左冠状窦2例,单一冠脉2例(均为单一右冠),左回旋支闭锁2例。结论双源CT冠状动脉成像可以清晰显示冠状动脉起源及走行,是一种良好的无创性的诊断冠状动脉起源异常的可靠方法。     

超声心动图诊断右肺动脉异常起源

目的 探讨经胸超声心动图（TTE）诊断单侧右肺动脉异常起源（AORPA）的价值。方法 收集经手术确诊为AORPA的患儿26例,分析其TTE特征。结果 AORPA的TTE表现为右肺动脉异常起源于升主动脉,主肺动脉和左肺动脉正常显示。26例患儿TTE均明确诊断为AORPA,诊断符合率为100%。其中9例合并Berry综合征,1例合并主动脉缩窄,22例合并动脉导管未闭,23例合并继发孔型房间隔缺损或卵圆孔未闭,25例合并重度肺动脉高压,TTE对各合并结构异常的诊断准确率分别为100%（26/26）、100%（26/26）、96.15%（25/26）、92.31%（24/26）、100%（26/26）。结论 TTE可早期、准确诊断AORPA,对其他心内伴随畸形诊断准确率高,多切面扫查有助于减少漏、误诊,可作为AORPA的首选检查方法。     

单侧肺动脉起源异常的超声心动图诊断及外科治疗

目的 分析单侧肺动脉起源异常(AOPA)的超声心动图诊断及外科治疗经验。 方法 回顾性分析经手术证实的19例AOPA患者的超声心动图特点及外科手术治疗方法。 结果 19例AOPA患者中,右肺动脉异常起源占68.42%(13/19);单纯肺动脉起源异常占31.58%(6/19),伴有其他心脏畸形者占68.42%(13/19)。3例患者接受动脉导管未闭结扎和异常起源肺动脉环缩术,余16例接受矫治术。超声心动图表现为主肺动脉分叉结构消失,缺如一侧的肺动脉由主动脉发出。超声诊断AOPA的准确率为94.73%(18/19)。术后超声心动图检测肺动脉吻合口及肺动脉分支无明显狭窄。 结论 超声心动图是诊断AOPA的有效方法,外科手术治疗效果满意。     

增强磁共振血管成像及CT血管成像对早期宫颈癌供血血管的显示

目的 对比增强磁共振血管成像（CE-MRA）和CTA对早期宫颈癌供血血管的显示效果。方法 回顾性分析30例经病理证实为早期宫颈癌患者术前的CE-MRA和CTA图像，评估CE-MRA和CTA对双侧子宫动脉主干的起源及连续性显示的一致性，同时评估两者对子宫动脉下行支的显示率。结果 CE-MRA和CTA对子宫动脉主干起源显示清楚、血管显示清楚且连续性不中断为50支，子宫动脉主干起源显示清楚、血管显示不清楚为5支，CE-MRA和CTA对于子宫动脉的起源及连续性的显示一致性良好（Kappa=0.80，P<0.05）。MRA对子宫动脉下行支的显示率约为55.00%（33/60），低于CTA对子宫动脉下行支的显示率，差异有统计学意义（χ²=26.22，P<0.01）。结论 CTA和CE-MRA均可良好地显示术前早期宫颈癌子宫动脉主干的起源及连续性，CTA对于早期宫颈癌患者子宫动脉下行支的显示较CE-MRA更具优势。     

建立及评价适于血流储备分数CT成像模拟的小型猪慢性冠状动脉狭窄模型

目的 建立适于血流储备分数CT成像（FFR_CT）模拟研究的小型猪慢性冠状动脉狭窄模型,并评价其可靠性。方法 巴马小型猪16头,开胸于冠状动脉前降支近或中段放置Ameroid缩窄环。建模后第2周进行冠状动脉CTA监测其狭窄程度;末次冠状动脉CTA检查2日内进行冠脉造影验证狭窄程度,并测血流储备分数（FFR）。基于冠状动脉CTA图像建立计算流体力学模型,获得FFR_CT值,并与FFR值进行比较,验证模型可靠性。结果 10头小型猪成功建模,共完成CTA检查24次,图像质量均达到诊断要求。术后第2周,前降支轻微狭窄,术后第3周9头实验猪狭窄>50%,术后第4周其余1头狭窄>50%。冠状动脉CTA示狭窄程度与冠状动脉造影结果一致。FFR_CT值与实测FFR值差异无统计学意义（t=-1.13,P=0.29）。结论 应用Ameroid环置入巴马小型猪冠状动脉左前降支近段或中段,并定期采用CTA监测,可有效建立适用于基于冠状动脉CTA图像无创性血流动力学模拟研究的慢性冠状动脉狭窄模型。     

经胸超声心动图诊断冠状动脉起源异常的临床价值

目的探讨经胸超声心动图(TTE)诊断冠状动脉起源异常(CAOA)的临床应用价值.方法应用TTE对11例CAOA患者进行检查,显示冠状动脉的起源、走行、血流方向、性质、时相和速度,观察有无合并其他心血管畸形,并与冠状动脉造影和手术结果比较.结果左冠状动脉起源于肺动脉5例、起源于右冠状动脉1例,左前降支起源于右冠状动脉1例,疑诊左前降支或左回旋支起源于右冠状动脉窦1例,左前降支和左回旋支单独起源于左冠状动脉窦2例,右冠状动脉高位发出1例.其中合并右冠状动脉-右室瘘1例,卵圆孔未闭1例,二尖瓣前叶夹层动脉瘤形成伴破裂1例,继发性心内膜弹力纤维增生症3例.超声结果与冠状动脉造影和手术结果符合.结论经胸超声心动图能准确提供冠状动脉的起源、走行、血流状态等信息,具有重要的临床应用价值.     

交叉肺动脉患儿临床及CT特点(附17例报道)

目的 探讨交叉肺动脉患儿的临床及CT特点。方法 回顾性分析17例交叉肺动脉患儿的临床及CT检查资料,记录合并心血管畸形、气道畸形、肺炎及其他临床合并症情况。结果 心胸CT三维重建图像可清晰显示交叉肺动脉及其合并心血管畸形、气道畸形、肺炎。其中合并房间隔缺损9例,室间隔缺损9例,主动脉右弓右降9例,动脉导管未闭5例,迷走左或右锁骨下动脉4例,主动脉缩窄3例,法洛四联症3例,主肺动脉间隔缺损2例,部分型肺静脉异位引流2例,左肺动脉狭窄1例,主动脉瓣狭窄1例,主动脉瓣二叶畸形1例,永存动脉干1例,右心室双出口1例,主动脉离断1例,肺动脉闭锁1例,冠状动脉起源异常1例,主动脉左弓右降1例,永存左上腔静脉1例,心肌致密化不全1例。10例合并肺炎,其中2例有支气管狭窄。其他临床合并症包括18-三体综合征、顽固性低钙血症、癫痫各1例。结论 交叉肺动脉是一种罕见的先天性心脏病,常伴其他心脏、大血管发育异常,且多合并肺炎。CT三维重建图像可直观、清晰显示交叉肺动脉及其合并心血管解剖异常,同时显示肺内、气道异常及其与大血管的立体关系。     

三维斑点追踪成像评价冠心病患者左心室缺血心肌节段应变

目的 探讨应用三维超声斑点追踪成像(3D-STI)技术心肌节段应变值评价冠心病(CHD)患者心肌缺血的临床应用价值。方法 将79例临床疑诊CHD但常规二维超声心动图检查室壁运动无异常的患者,以冠状动脉造影检查任意一支冠状动脉主干或主要分支狭窄≥50%作为CHD诊断标准,分为两组,其中CHD组40例,对照组39名。回顾性分析两组超声心动图及临床资料,包括体质量指数(BMI),常规二维超声心动图指标 和三维斑点追踪成像(3D-STI)指标 。并以冠状动脉造影结果为金标准,绘制ROC曲线,分析各应变值对心肌缺血的诊断效能。结果 冠状动脉造影结果显示,左前降支供血区缺血心肌节段共252段,左回旋支供血区缺血心肌节段共95段,右冠状动脉供血区缺血心肌节段共110段。两组间BMI及常规二维超声心动图指标差异均无统计学意义(P均>0.05)。对照组牛眼图颜色均一,各节段曲线分布规律,形态一致;CHD组牛眼图可见缺血节段颜色变浅,应变曲线紊乱、变形、峰值前移、后移或倒置。CHD组左前降支、左回旋支及右冠状动脉供血区AS、CS、LS及RS均较对照组明显减低(P均<0.01)。ROC曲线分析结果显示,LS诊断左前降支、左回旋支、右冠状动脉心肌缺血的敏感度最高,分别为90.1%、89.5%、89.1%,而AS的诊断特异度最高,分别为90.8%,83.1%、89.2%。结论 CHD患者各缺血节段应变值均减低。采用3D-STI可定量评价左心室节段运动异常,在诊断心肌缺血的应变指标中,LS敏感度最高,AS特异度最高。     

宽体探测器CT行冠状动脉CTA和头颈部CTA“一站式”扫描

目的 探讨采用宽体探测器CT进行心脑血管CTA"一站式"扫描的价值。方法 回顾性分析73例接受心脑血管CTA扫描患者的图像,根据扫描方法分为A组和B组。A组（n=32）注射1次对比剂行冠状动脉CTA扫描后立即行头颈部CTA扫描;B组（n=41）注射2次对比剂分别行冠状动脉CTA和头颈部CTA扫描。对2组患者的图像质量进行主观评分和客观评价,比较其图像质量、辐射剂量和对比剂用量。结果 A组和B组CTA图像质量均可满足诊断要求,且冠状动脉CTA和头颈部CTA图像质量主观评分差异均无统计学意义（P均>0.05）。A组与B组冠状动脉和头颈部CTA中,右冠状动脉、左前降支、回旋支和颈总动脉、颈内动脉、大脑中动脉CT值差异均无统计学意义（P均> 0.05）,冠状动脉CTA的噪声和CNR、头颈部CTA的噪声差异有统计学意义（P均<0.05）。A组和B组对比剂用量分别为（51.00±6.69）ml和（105.41±14.56）ml,差异有统计学意义（P < 0.001）。2组CT容积剂量指数和有效剂量差异均无统计学意义（P均>0.05）。结论 宽体探测器CT应用于心脑血管CTA"一站式"扫描时,图像质量可满足诊断要求,且能明显降低对比剂用量。     

Anomalous origin of the left circumflex coronary artery from the pulmonary artery. A very rare congenital anomaly in an adult patient diagnosed by cardiovascular magnetic resonance

Here we report for the first time on the diagnostic potential of cardiovascular magnetic resonance (CMR) to delineate the proximal course of an anomalous left circumflex coronary artery (LCX) originating from the right pulmonary artery in an adult patient with no other form of congenital heart disease. The patient was referred to our institution due to exertional chest discomfort. X-Ray coronary angiography showed a normal left anterior descending coronary artery (LAD) and right coronary artery (RCA), while the LCX was filled retrograde by collateral flow through the LAD and the RCA. The origin of the LCX was postulated to be the pulmonary artery, but the exact origin of the anomalous artery could not be depicted on conventional angiograms. CMR provided the unambiguous depiction of the origin of the anomalous LCX from the right pulmonary artery and the delineation of its proximal course in this case of a very rare coronary anomaly in adults.     

Effect of infarct site on the clinical endpoints of thrombolytic-treated ST-elevation myocardial infarction

IntroductionSome studies suggest better outcomes after the use of thrombolytics in inferior ST-elevation myocardial infarction (STEMI) compared to other locations. The goal of this study is to compare the clinical endpoints of thrombolytic-treated STEMI based on coronary artery distribution.MethodsThe study population was extracted from the 2014 Nationwide Readmissions Data using the International Classification of Diseases, Ninth Revision, Clinical Modifications codes for STEMI, thrombolytic infusion, and complications of STEMI. Primary study endpoints included in-hospital all-cause mortality, length of hospital stay (LOS), cardiogenic shock, and mechanical complications of STEMI.ResultsA principal diagnosis of thrombolytic-treated STEMI was identified for in 1231 patients (mean age 61.5 years; 26.5% female). Four hundred and thirty-one STEMIs occurred in the left anterior descending (LAD) artery distribution, 124 in the left circumflex (LCX) artery distribution, and 676 in the right coronary artery (RCA) distribution. In comparison to the LAD and LCX distributions, thrombolytic-treated STEMIs in the RCA distribution were associated with lower mortality (6.5% with LAD, 5.7% with LCX, and 3.6% with RCA; p = 0.02), fewer cardiogenic shock (12.3% with LAD, 12.1% with LCX, and 7.7% with RCA; p = 0.01), and shorter LOS (4.5 days with LAD, 3.9 with LCX, and 3.6 days with RCA; p < 0.01). Mechanical complications showed no significant difference based on coronary distribution (2.3% with LAD, 3.2% with LCX, and 1.2% with RCA; p = 0.17).ConclusionsThrombolytic-treated STEMIs in the RCA distribution were associated with lower in-hospital all-cause mortality, cardiogenic shock, and shorter LOS. Mechanical complications were not different based on coronary distribution.     

Anomalous left anterior descending artery diagnosed on pulmonary artery computed tomography

Typically, the left anterior descending artery (LAD) and left circumflex artery (LCX) arise from the left main coronary artery.However, uncommon coronary anomalies may be found in clinical practice. This case presents with a rare finding where the LAD originates from the right coronary artery (RCA) separately from the LCX and takes an interarterial pathway to reach its perfusion territory.A 49-year-old Hispanic female with hypertension and diabetes mellitus presented to the emergency department with a 7-day history of chest pain. She denied nausea, diaphoresis, syncope, or other symptoms. A grade 3 out of 6 systolic murmur was noted on physical examination. Computed tomography of the pulmonary arteries (CTPA) revealed that the patient had no left main coronary artery. The patient's LAD arose from the proximal RCA and took an inter-arterial course. Subsequent coronary catheterization showed no stenosis of the coronary arterial system. The patient's chest pain subsided during the course of her admission and she was deemed stable for discharge with close cardiology follow up.In general, coronary artery anomalies are an uncommon finding in clinical practice. However, it is important to realize the different pathways of coronary artery anomalies because those with the inter-arterial subtype, such as our patient, may result in sudden cardiac death. All cases of clinically suspected inter-arterial coronary artery anomalies are recommended to undergo imaging studies to help visualize anatomic features as a guide for further management. This case represents the first reported diagnosis of this type of anomalous coronary artery on CTPA.     

Epicardial adipose tissue parameters for predicting coronary atherosclerotic heart disease and the degree of coronary artery stenosis in HIV infected patients北大核心CSCD

目的观察以心外膜脂肪组织(EAT)各参数预测HIV感染者冠状动脉粥样硬化性心脏病(CHD)及冠状动脉狭窄程度的价值。方法将149例HIV感染者根据存在CHD与否分为CHD组(n=97)与非CHD组(n=52),再根据冠状动脉狭窄程度将CHD组分为轻度(n=60)、中度(n=23)及重度狭窄亚组(n=14);选取52名非HIV、非CHD志愿者作为对照组。计算各组及亚组冠状动脉左前降支(LAD)、左回旋支(LCX)及右冠状动脉(RCA)周围脂肪衰减指数(FAI)、EAT体积和EAT密度;观察上述各参数预测HIV感染者CHD及冠状动脉狭窄程度的效能。结果CHD组中,各亚组RCA、LAD和LCX周围FAI差异均有统计学意义(P均<0.05),重度狭窄亚组FAI明显高于轻度狭窄亚组(P<0.05)。非CHD组RCA、LAD和LCX周围FAI均明显高于对照组(P均<0.05)。以-87.74 HU为RCA周围FAI的截断值,其预测冠状动脉重度狭窄的敏感度为83.30%,特异度为63.00%,曲线下面积(AUC)为0.75;以-72.29 HU为LAD周围FAI的截断值,其预测冠状动脉重度狭窄的敏感度为75.00%,特异度为80.20%,AUC为0.95;二者AUC差异有统计学意义(Z=2.86,P<0.01)。结论冠状动脉周围FAI可用于评估冠状动脉狭窄程度,尤以LAD周围FAI的价值最高。     

2742例不同年龄段冠脉造影患者冠脉病变特点分析

目的总结分析各年龄段患者冠状动脉造影检查（CAG）各支冠脉血管病变的特征及差异，为临床诊治提供决策。 方法回顾性分析2013年1月至2016年12月昆明医科大学第五附属医院/红河州滇南中心医院心内科住院且行CAG的患者2742例，按年龄分为青年组（18~40岁）126例，平均年龄（35.10±4.91）岁；中年组（41~65）岁1774例，平均年龄（55.00±6.60）岁；老年组（≥66岁）842例，平均年龄（71.68±4.49岁）。运用自编的"CAG检查Epidata数据库"，收集个人基本信息和冠脉数据，包括：左主干（LM）、右冠状动脉（RCA）、左前降支（LAD）、左回旋支（LCX）及各支血管的病变特征、TIMI血流情况、放置支架及手术情况，并依据美国心脏协会所制定的冠脉狭窄程度评价标准计算Gensini积分。 结果青年组、中年组和老年组患者行CAG检查的构成比分别为4.6%、64.7%、30.7%，其中以中老年人群占比最高为95.4%；3组患者男性比例（84.1%、65.8%、58.7%）、年龄[（35.10±4.91）岁、（55.00±6.60）岁、（71.68±4.49）岁]、LM病变（0.8%、5.4%、12.4%）、RCA病变（38.9%、62.5%、77.7%）、LAD病变（55.6%、81.0%、92.2%）、LCX病变（23.0%、52.5%、71.1%）比较，差异均具有统计学意义（P<0.05）；3组患者血管弥漫性病变（4.0%、5.2%、9.3%）、钙化病变（1.6%、8.2%、11.2%）、侧支循环的建立（6.3%、3.0%、15.8%）、急诊手术比例（18.3%、24.5%、20.0%）、需择期PCI术比例（6.3%、13.7%、18.9%）、手术时间[12.0（7.0，28.5）min、15.0（9.0，38.0）min、16.0（10.0，45.5）min]比较，差异均具有统计学意义（P<0.05），而3组RCA、LM/LAD、LCX是否放支架、是否有血栓形成及是否有瘤样扩张比较，差异无统计学意义（P>0.05）。3组患者3支血管（RCA、LAD、LCX）TIMI血流为3级（RCA：61.1%、86.0%、84.9%，LAD：54.8%、75.2%、82.5%，LCX：75.4%、47.9%、62.6%）、LAD病变TIMI血流为0级（15.1%、7.7%、7.6%）、LCX病变TIMI血流为1级（1.6%、0.3%、1.7%）及2级（15.9%、1.5%、2.0%）比例比较，差异均具有统计学意义（P<0.05）。3组患者冠脉病变程度Gensini评分[5.0（0，39.8）分、13.0（4.0，35.6）分、22.0（10.0，50.0）分]比较，差异具有统计学意义（P<0.05）。而RCA病变TIMI血流0级、1级与2级，LAD病变TIMI血流1级与2级，LCX病变TIMI血流0级差异无统计学意义（P>0.05）。 结论不同年龄段患者冠脉病变有差异，随着年龄的增长，冠脉病变率增加；不同年龄段LM、RCA、LAD、LCX冠脉病变比例、弥漫病变、钙化病变、侧支循环的建立及冠脉严重程度Gensini积分随着年龄的增长而增加；3支血管以LAD病变比例最高；LCX血管病变以TIMI血流1级、TIMI血流2级的血流缓慢现象差异显著。     

前壁合并下壁心肌梗死的临床特点及罪犯血管

目的探讨前壁合并下壁心肌梗死的临床特点及其与冠状动脉造影结果的关系。方法对22例前壁合并下壁心肌梗死患者进行回顾性研究分析。结果本组患者22例,男21例,女1例。合并高血压病、高脂血症及糖尿病分别为72.7%、31.8%和18.2%。有吸烟史占22.7%。典型胸痛、不典型胸痛及无胸痛分别为54.5%、22.7%和22.7%。胸片、心脏超声、心电图及肾功能异常分别为72.7%、100%、100%和18.2%。冠状动脉造影显示:冠脉为右优势分布14例,占63.6%,左优势分布3例,占13.6%;均衡型分布5例,占22.7%。病变累及冠脉66支共76处,单支病变22.7%、二支病变27.3%、多支病变50.0%,受累的前降支(LAD)、右冠状动脉(RCA)、左回旋支(LCX)及左主干(LM)分别为100%、54.5%、72.7%和9.1%。A型病变累及冠脉17支22处(25.8%)、B型病变累及冠脉26支30处(39.4%)、C型病变累及冠脉23支24处(34.8%),重度以上狭窄占80.3%。16例(72.7%)有不同程度的侧支循环。3例AAMI+AIMI中,2例罪犯血管为单支病变,均为LAD,1例为多支病变,累及LAD、LCX及RCA。结论前壁合并下壁心肌梗死患者,多合并危险因素,临床表现复杂,临床检查多有异常,冠脉分布以右优势型居多,冠脉病变以二支及多支病变为主,B型及C型病变占大多数、冠脉狭窄程度较严重,多数患者有不同程度的侧支循环。AAMI+AIMI中,罪犯血管多为LAD,且预后良好。     

Arterial supply of the sinoatrial node: a CT coronary angiographic study

We aimed to investigate the variances in especially the origin, course and termination of the sinoatrial node (SAN) artery in this study, using coronary CT angiography. The coronary CT angiography images of 251 patients (190 men and 61 women; age range, 20–82 years; mean age, 54.4 ± 13.6 years) were retrospectively analyzed. The SAN artery (arteries) in each case was named according to a special nomenclature with regard to their origin, course and termination. The sinoatrial node was being vascularized by a single artery in 241 (96%) cases and by two arteries in 10 (4%) cases. It was arising from RCA in 139 (55.4%) cases, from LCX in 99 (39.4%) cases, from the aorta in 2 (0.8%) cases, and from the bronchial artery in 1 (0.4%) case. The mean diameter of the SAN arteries was 2.3 mm. The mean distance between the origin of the SAN artery from RCA and the RCA ostium was 16.2 mm, from LCX and the origin of LCX was 19.3 mm. Frequency of the atrial branch was 35.9%. S-shaped SAN artery is determined in 51 (20.3%) cases. Coronary CT angiography is considerably effective in depicting the various vascularization types of SAN.     

心率、扇区重组、时相重建对64层螺旋CT冠状动脉成像质量的影响

目的探讨心率、重组方法和重建时相窗对64层螺旋CT冠状动脉成像质量的影响。方法398例64层螺旋CT冠状动脉造影扫描,根据不同心率应用不同扇区重组、多相位重建,传入后处理工作站进行图像重建。结果心率在50-70次/分所得冠状动脉图像质量较好,但扫描时心律变化幅度大者成像质量下降。心率〉75次/分,用双扇区和四扇区重组能获得相对高质量的图像。左前降支、回旋支在75%R-R时相重建图像较好,右冠状动脉在45%R-R时相显示较好。结论64层螺旋CT冠状动脉成像质量与心率、扇区重组的应用和多相位重建密切相关。     

Reproducibility of free-breathing cardiovascular magnetic resonance coronary angiography.

OBJECTIVE: Contemporary free-breathing non contrast enhanced cardiovascular magnetic resonance angiography (CMRA) was qualitatively and quantitatively evaluated to ascertain the reproducibility of the method for coronary artery luminal dimension measurements. SUBJECTS AND METHODS: Twenty-two healthy volunteers (mean age 32 +/- 7 years, 12 males) without coronary artery disease were imaged at 2 centers (1 each in Europe and North America) using navigator-gated and corrected SSFP CMRA on a commercial whole body 1.5T System. Repeat images of right (RCA, n = 21), left anterior descending (LAD, n = 14) and left circumflex (LCX, n = 14) coronary arteries were obtained in separate sessions using identical scan protocol and imaging parameters. True visible vessel length, signal-to-noise (SNR), contrast-to-noise ratios (CNR) and the average luminal diameter over the first 4 cm of the vessel were measured. Intra-observer, inter-observer and inter-scan reproducibility of coronary artery luminal diameter were determined using Pearson's correlation, Bland-Altman analysis and intraclass correlation coefficients (ICC). RESULTS: CNR, SNR and the mean length of the RCA, LAD and LCX imaged for original and repeat scans were not significantly different (all p > 0.30). There was a high degree of intra-observer, inter-observer and inter-scan agreements for RCA, LAD and LCX luminal diameter respectively on Bland-Altman and ICC analysis (ICC's for RCA: 0.98. 0.98 and 0.86; LAD: 0.89, 0.89 and 0.63; LCX: 0.95, 0.94 and 0.79). CONCLUSION: In a 2-center study, we demonstrate that free-breathing 3D SSFP CMRA can visualize long continuous segments of coronary vessels with highly reproducible measurements of luminal diameter.