Natural History of Abdominal Aortic Aneurysm and Indication for Surgical Repair.

概要

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The natural course of abdominal aortic aneurysm was studied in 33 patients by measuring the diameter size of aneurysms by computed tomography during period of 3 to 36 months. The ratio of the increase in diameter of aneurysms was calculated at each period (total 69 periods). The expansive ratio which had a diameter of over 5cm (1.38cm/year) exceeded that of under 5cm (0.41cm/year) by more than three times. Saccular aneurysms tended to expand more rapidly than fusiform aneurysms, and particularly this tendency was obvious in small size of aneurysms. The expansive ratio of patients with hypertention was lower than that of the patients without hypertension. The age of patients had no effect on the expansion ratio. Since operative mortality for ruptured abdominal aortic aneurysm is high, surgery before rupture is essential to reduce the mortality of abdominal aortic aneurysm. We decided that the patient should be operated when the aneurysms develop a diameter of 5cm in cases of fusiform aneurysms and 4cm in cases of saccular aneurysms. In addition it is necessary to consider age, possible complications and other conditions of each case in order to determine the timing of surgical repair.
特定非営利活動法人日本心臓血管外科学会の論文