Group A dissections are the more serious of the two due to the location of the dissection in the ascending aorta, which leads to a higher risk of coronary artery bypass.
32.
Repair of an enlargement of the ascending aorta from an aneurysm or previously unrecognized and untreated aortic dissections is recommended when greater than in size to decrease the risk of dissection.
33.
As the septum forms, the two lateral thickenings are split, so that the ascending aorta and pulmonary trunk have three thickenings each ( an anterior or posterior, and half of each of the lateral thickenings ).
34.
The cardiopulmonary bypass is then initiated by inserting a cannula into the ascending aorta as circulatory arrest necessary during the procedure; the patient must be cooled for a minimum of 20 minutes prior to beginning the repair.
35.
A study of people who died after traumatic aortic rupture found that in 55 65 % of cases the damage was at the aortic isthmus and in 10 14 % it was in the ascending aorta or aortic arch.
36.
When the patient is fully cooled, the ascending aorta is clamped as close as possible below the HLM cannula, and cryocardioplegia is achieved by delivering cold blood to the heart via the ascending aorta ( below the cross clamp ).
37.
When the patient is fully cooled, the ascending aorta is clamped as close as possible below the HLM cannula, and cryocardioplegia is achieved by delivering cold blood to the heart via the ascending aorta ( below the cross clamp ).
38.
Prior to the year 2000, neuropreservation was performed by surgical separation of the body from the head ( called cephalic isolation or " neuroseparation " ) at the end of cryoprotectant perfusion performed on the upper body via the ascending aorta.
39.
The "'ascending aorta "'( AAo ) is a portion of the aorta commencing at the upper part of the base of the left ventricle, on a level with the lower border of the third costal cartilage behind the left half of the sternum.
40.
Lesser patency rates can be expected with radial artery grafts and " free " internal thoracic artery grafts ( where the proximal end of the thoracic artery is excised from its origin from the subclavian artery and re-anastomosed with the ascending aorta ).
