Blood flow measured by magnetic resonance imaging at rest and exercise after surgical bypass of aortic arch obstruction.
Blood flow measured by magnetic resonance imaging at rest and exercise after surgical bypass of aortic arch obstruction.
复制标题
主动脉弓梗阻搭桥手术后，通过磁共振成像测量静息和运动时的血流量。
DOI：
10.1016/j.ejcts.2009.07.041
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
V. Hjortdal
中科院分区：
文献类型：
--
作者：
L. Pedersen;T. Pedersen;E. M. Pedersen;Hilde Højmyr;K. Emmertsen;V. Hjortdal
引言：复杂主动脉弓阻塞行升降主动脉搭桥术后的血流分布描述不清。目的：通过磁共振（MR）成像研究主动脉弓阻塞和搭桥管患者以及健康对照者在静息和运动时的血流。材料和方法：7例患者（中位数18岁（范围：14-54岁），体重79公斤（范围51-91 kg））进行了研究25个月（范围6-68个月）后，手术插入14-或16-mm旁路管从升到远端降胸主动脉。7名性别和年龄匹配的血压正常的受试者作为对照。测量了所有参与者的升主动脉和近端降胸主动脉以及患者在静息和仰卧腿运动期间（0.5和1.0 W kg− 1）的旁路管中的MR实时流量。结果：患者静息时的升主动脉流量为2.9 l min− 1 m −2（范围2.3-4.4），在1.0 W kg−1时随着运动增加至5.3（范围4.3-7.3），与对照组（3.4（范围2.4-4.6）和6.1（范围5.0-6.9））无差异。在静息状态下，旁路管的流量与近端降主动脉的流量大致相同（分别为1.5（范围0.7-2.0）和1.0（范围0.2-2.0）），在运动期间流量增加相似（分别为2.8（范围1.5-4.0）和2.0（范围0.8-4.1），1.0 W kg−1）。流到上半身没有组之间的差异，也没有改变与仰卧腿exercise.Conclusion：主动脉弓阻塞，升降主动脉旁路管提供了正常的流量，下半身在休息和仰卧腿运动过程中，没有证据表明从上半身窃取。
Introduction:Blood flow distribution after ascending-to-descending aortic bypass in complex aortic arch obstruction is poorly described.Objective:To study blood flow by magnetic resonance (MR) imaging at rest and during exercise in patients with aortic arch obstruction and a bypass tube and in healthy controls.Material and methods:Seven patients (median 18 years (range: 14–54 years) and weight 79 kg (range 51–91 kg)) were studied 25 months (range 6–68 months) following surgical insertion of 14- or 16-mm bypass tube from the ascending to the distal descending thoracic aorta. Seven sex- and aged-matched normotensive subjects served as controls. MR real-time flow was measured in the ascending aorta and the proximal descending thoracic aorta in all participants and in the bypass tube in patients at rest and during supine leg exercise at 0.5 and 1.0 W kg−1.Results:Ascending aortic flow at rest in patients was 2.9 l min−1m−2(range 2.3–4.4) and increased with exercise to 5.3 (range 4.3–7.3) at 1.0 W kg−1, which was not different from controls (3.4 (range 2.4–4.6) and 6.1 (range 5.0–6.9)). The bypass tube carried roughly the same flow as the proximal descending aorta at rest (1.5 (range 0.7–2.0) and 1.0 (range 0.2–2.0), respectively, and flows increased similarly during exercise (2.8 (range 1.5–4.0) and 2.0 (range 0.8–4.1), respectively at 1.0 W kg−1). Flow to the upper body did not differ between groups nor changed with supine leg exercise.Conclusion:With aortic arch obstruction, an ascending-to-descending aortic bypass tube provides normal flow to the lower body at rest and during supine leg exercise without evidence of steal from the upper body.
通过磁共振成像改进主动脉缩窄压力梯度的测量。
影响因子：
24
作者：
Oshinski,JN;Parks,WJ;Markou,CP;Bergman,HL;Larson,BE;Ku,DN;MukundanJr,S;Pettigrew,RI
通讯作者：
Pettigrew,RI