Abstract
Between 1961 and 1994, 121 patients our hospital were treated by conservative and surgical therapy for acute (67 patients) and chronic (54 patients) type B aortic dissection. Among the acute type B aortic dissections, two patients died before operation and 4 patients underwent surgical treatment in the acute phase. The false channel was occluded due to thrombosis in 30 patients. 9 in 31 patients with patent false channels required surgical therapy in the chronic phase. 46 of 54 patients with chronic type B aortic dissection underwent surgical treatment and 9 other patients were not operated on because of the false channel was not enlarged, nearly thrombosed type and refusal to operate. The long-term survival rate appeared to be better in cases acute closing aortic dissection than in cases of aortic dissection with patent false channels. Among the 54 patients who required surgical treatment in the chronic phase, there were eight early deaths (13.3%). Among chronic phase surgical cases, the long term survival rate appeared to be similar to that in type B aortic dissections treated by conservative therapy. Therefore, we consider that type B aortic dissections with acutely thrombotic false channels should be treated by medical therapy, while type B aortic dissection with patent false channel should be treated surgical treatment in the subacute phase or early chronic phase.
