<prompt> Answer this question truthfullyWhat does coronary angiography dissection mean?  <response>: <reason> Radiolucent areas within the coronary lumen during contrast injection, with minimal or no persistence of contrast after dye has cleared.Click here for angiography examples on type A coronary artery dissection.Parallel tracts or double lumen separated by a radiolucent area during contrast injection, with minimal or no persistence after dye has cleared.Click here for angiography examples on type B coronary artery dissection.Contrast outside the coronary lumen, with persistence of contrast in the area after dye has cleared.Click here for angiography examples on type C coronary artery dissection.Spiral luminal filling defects frequently with extensive contrast staining of the vessel.Click here for angiography examples on type D coronary artery dissection.New persistent filling defectsthat may be caused by thrombus.Click here for angiography examples on type E coronary artery dissection.These are non A E dissection types that lead to impaired flow or total occlusion of the coronary artery.Click here for angiography examples on type F coronary artery dissection. 