Koji Tsutsumi1,2,3, Kenichi Hashizume4, Yoshito Inoue5. 1. Division of Cardiovascular Surgery, Saiseikai Utsunomiya Hospital, Tochigi, Japan. con318@ndmc.ac.jp. 2. Division of Cardiovascular Surgery, Ashikaga Red Cross Hospital, Tochigi, Japan. con318@ndmc.ac.jp. 3. Department of Cardiovascular Surgery, Ashikaga Red Cross Hospital, 284-1 Yobecho, Ashikaga City, Tochigi, 326-0843, Japan. con318@ndmc.ac.jp. 4. Division of Cardiovascular Surgery, Saiseikai Utsunomiya Hospital, Tochigi, Japan. 5. Division of Cardiovascular Surgery, Hiratsuka Municipal Hospital, Hiratsuka, Kanagawa, Japan.
Abstract
BACKGROUND: The purpose of this study was to clarify the natural history of the ascending aorta and to identify risk factors for late ascending aortic events after first isolated aortic valve replacement (AVR). METHODS: A total of 287 patients undergoing AVR were enrolled. The patients were categorized into two groups based on the diameter of the ascending aorta at the time of AVR, as determined by computed tomography: Group A (n = 233) was defined as an ascending aortic diameter <40 mm, and Group B (n = 54) was defined as an ascending aortic diameter ≥40 mm. RESULTS: The mean follow-up period was 7.6 years. The baseline diameter of the ascending aorta was 31.4 ± 4.8 mm in Group A and 44.7 ± 4.2 mm in Group B. These values increased to 35.9 ± 7.4 mm in Group A and 50.1 ± 7.3 mm in Group B during the follow-up period (P < 0.001). Ten patients had acute type A aortic dissection (Group A: 1 patient vs. Group B: 9 patients; P < 0.001), and three patients had enlargement of the ascending aorta to ≥55 mm in diameter (Group A: 1 patient vs. Group B: 2 patients). Multivariate analysis revealed that the baseline ascending aortic diameter was the only significant risk factor for developing late ascending aortic events (P < 0.001). CONCLUSIONS: AVR alone may not prevent further enlargement of the ascending aorta. An ascending aorta ≥40 mm in diameter at the time of AVR increased the risk of late ascending aortic events.
BACKGROUND: The purpose of this study was to clarify the natural history of the ascending aorta and to identify risk factors for late ascending aortic events after first isolated aortic valve replacement (AVR). METHODS: A total of 287 patients undergoing AVR were enrolled. The patients were categorized into two groups based on the diameter of the ascending aorta at the time of AVR, as determined by computed tomography: Group A (n = 233) was defined as an ascending aortic diameter <40 mm, and Group B (n = 54) was defined as an ascending aortic diameter ≥40 mm. RESULTS: The mean follow-up period was 7.6 years. The baseline diameter of the ascending aorta was 31.4 ± 4.8 mm in Group A and 44.7 ± 4.2 mm in Group B. These values increased to 35.9 ± 7.4 mm in Group A and 50.1 ± 7.3 mm in Group B during the follow-up period (P < 0.001). Ten patients had acute type A aortic dissection (Group A: 1 patient vs. Group B: 9 patients; P < 0.001), and three patients had enlargement of the ascending aorta to ≥55 mm in diameter (Group A: 1 patient vs. Group B: 2 patients). Multivariate analysis revealed that the baseline ascending aortic diameter was the only significant risk factor for developing late ascending aortic events (P < 0.001). CONCLUSIONS: AVR alone may not prevent further enlargement of the ascending aorta. An ascending aorta ≥40 mm in diameter at the time of AVR increased the risk of late ascending aortic events.
Entities:
Keywords:
Aortic valve replacement; Ascending aortic diameter; Late aortic complication
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