Pulmonary vein contraction: characterization of dynamic changes in pulmonary vein morphology using multiphase multislice computed tomography scanning.
Pulmonary vein contraction: characterization of dynamic changes in pulmonary vein morphology using multiphase multislice computed tomography scanning.
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DOI：
10.1016/j.hrthm.2008.09.010
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发表时间：
2008-12
期刊：
影响因子：
5.5
通讯作者：
d'Avila, Andre
中科院分区：
文献类型：
--
作者：
Thiagalingam, Aravinda;Reddy, Vivek Y.;Cury, Ricardo C.;Abbara, Suhny;Holmvang, Godtfred;Thangaroopan, Molly;Ruskin, Jeremy N.;d'Avila, Andre
肺静脉（PV）收缩的存在和程度尚未明确定义。为了确定是否存在PV收缩，可以使用多层螺旋CT扫描（MSCT）进行可视化，因为这可能表明这种方式可能有助于监测肺静脉隔离手术后的患者。对29例（平均年龄57.5±12岁）因疑似冠状动脉疾病而行MSCT的患者（无结构性心脏病或左房解剖变异）进行分析。采用多平面重建技术，在距离开口0、5、10和15 mm处分两阶段（最大和最小尺寸）测量PV直径。计算每条肺静脉3个5mm段的射血分数。右侧和左侧肺静脉收缩和最大心房收缩分别发生在心动周期的中位数85%和95%。心房收缩高峰时PV最小体积的时间一致性表明PV体积变化继发于主动收缩，而非被动反流和PV扩张。射血分数最高的是上静脉：右上静脉（近端到远端三个节段分别为36.7%、27.8%和16%）和左上静脉（26.9%、21.3%和12.1%），而右下静脉（21.1%、6.6%、- 0.7%）和左下静脉（15%、9.3%、7.6%）。活动性肺静脉收缩引起的体积变化可延伸至静脉内15mm，这种影响在上静脉中最为明显。
The presence and extent of contraction within the pulmonary veins (PV) have not been defined clearly. To determine if PV contraction exists, and can be visualized using multislice CT scanning (MSCT) as this may indicate that this modality may be useful for monitoring patients after pulmonary vein isolation procedures. Analysis was performed on 29 patients (mean age 57.5± 12 years) undergoing MSCT for suspected coronary artery disease without structural heart disease or left atrial anatomical variants. Multiplane reconstructions were used to measure PV diameters at 0, 5, 10, and 15 mm from the ostium in two phases (maximum and minimum size). The ejection fractions of three 5mm segments were calculated for each pulmonary vein. Right-sided and left-sided pulmonary vein contraction and maximal atrial contraction occurred at a median of 85% and 95% of the cardiac cycle, respectively. The temporal concordance of minimal PV volume during peak atrial contraction indicated that the PV volume changes are secondary to active contraction rather than passive reflux and PV distension. The ejection fractions were highest in the superior veins: right superior PV (36.7%, 27.8% and 16%, respectively for the three segments from proximal to distal) and left superior PV (26.9%, 21.3% and 12.1%), in comparison to the right inferior PV (21.1%, 6.6%, - 0.7%) and left inferior PV (15%, 9.3%, 7.6%). Volume changes related to active pulmonary vein contraction occur extending up to 15mm into the veins, and this effect is most pronounced in the superior veins.
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DOI：
10.1046/j.1540-8167.2003.02444.x
发表时间：
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影响因子：
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发表时间：
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