Hansen Kristoffer Lindskov, Møller-Sørensen Hasse, Kjaergaard Jesper, Jensen Maiken Brit, Jensen Jørgen Arendt, Nielsen Michael Bachmann
Radiology Department, Rigshospitalet, Denmark.
Cardiothoracic Anesthesiology Department, Rigshospitalet, Denmark.
Ultrasound Med Biol. 2017 Aug;43(8):1607-1617. doi: 10.1016/j.ultrasmedbio.2017.03.018. Epub 2017 May 8.
Aortic valve stenosis alters blood flow in the ascending aorta. Using intra-operative vector flow imaging on the ascending aorta, secondary helical flow during peak systole and diastole, as well as flow complexity of primary flow during systole, were investigated in patients with normal, stenotic and replaced aortic valves. Peak systolic helical flow, diastolic helical flow and flow complexity during systole differed between the groups (p < 0.0001), and correlated to peak systolic velocity (R = 0.94, 0.87 and 0.88, respectively). The study indicates that aortic valve stenosis increases helical flow and flow complexity, which are measurable with vector flow imaging. For assessment of aortic stenosis and optimization of valve surgery, vector flow imaging may be useful.
主动脉瓣狭窄会改变升主动脉中的血流。通过对升主动脉进行术中矢量血流成像，研究了正常主动脉瓣、狭窄主动脉瓣和置换主动脉瓣患者在收缩期峰值和舒张期的继发性螺旋血流，以及收缩期原发性血流的血流复杂性。各组之间收缩期峰值螺旋血流、舒张期螺旋血流和收缩期血流复杂性存在差异（p < 0.0001），并且与收缩期峰值速度相关（分别为R = 0.94、0.87和0.88）。该研究表明，主动脉瓣狭窄会增加螺旋血流和血流复杂性，这些可以通过矢量血流成像进行测量。对于评估主动脉狭窄和优化瓣膜手术，矢量血流成像可能有用。
