New classification of aortic dissection during the cardiac cycle as pulsating type and static type evaluated by electrocardiogram-gated multislice CT.

摘要: Abstract Purpose In some four-dimensional images acquired by electrocardiogram (ECG)-gated multislice computed tomography (MSCT) of thoracic aortic dissection (AD), true lumen (TL) gets larger (pulsating-type), whereas in others, TL and false (FL) do not change (static-type) a cardiac cycle. We have characterized these types. Materials methods Twenty subjects (10 with double-barrel type descending AD 10-controls) were enrolled. MSCT covered the thorax, reconstructed every 10% from 0–90% R–R interval. Two physicians measured FL areas aorta for each phase at 1) left-pulmonary-artery, 2) left-main-coronary-artery, 3) right-coronary-artery levels. Results By designating pulsating-range control data as normal, classified pulsating or static when maximum area was >125% minimum any 3 Five 5 static-type AD. Excluding those entry distal portion descending-thoracic-aorta retrograde flow FL, mean-period onset 4.3±5.9 pulsating-type 42.0±13.0 months ( P Conclusion AD, is more common if acute-phase located distal-portion FL. This new classification may usefully differentiate unstable-AD affected pulsation stable-AD.