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Published on: March 28, 2025
[Aortic dissection after aortic valve replacement with an aorto-left atrial fistula; report of a case]
H Kanamitsu1, H Minami, H Yoshitaka
1Department of Cardiovascular Surgery, The Sakakibara Heart Institute of Okayama, Okayama, Japan.
Insights
Aortocameral fistula, a rare complication following aortic valve replacement (AVR), can form between the aorta and the left atrium. Postoperative adhesions may play a key role in its development.
Area of Science:
- Cardiovascular Surgery
- Cardiac Surgery
- Aortic Aneurysm
Background:
- Aortocameral fistula is a rare but serious complication of aortic dissection.
- Aortic dissection following aortic valve replacement (AVR) is uncommon.
- This case highlights a specific instance of this complication.
Observation:
- A 76-year-old male presented with facial edema and chest discomfort one year post-AVR.
- A continuous murmur was detected on auscultation.
- Computed tomography and transesophageal echocardiography revealed a fistula between the ascending aorta's false lumen and the left atrium.
Findings:
- The patient had a dissecting aneurysm of the ascending aorta.
- A fistula directly connecting the aorta to the left atrium was confirmed.
- Surgical intervention included ascending aorta replacement and fistula closure.
Implications:
- Postoperative adhesions between the aortic root and the left atrium were noted.
- These adhesions are hypothesized to be a significant factor in aortocameral fistula formation.
- Understanding this mechanism is crucial for preventing and managing this complication.
Abstract:
Aortocameral fistula is a rare complication of aortic dissection. We herein report a case of aortic dissection after aortic valve replacement (AVR) complicated with a fistula to the left atrium. A 76-year-old man who had undergone AVR 1 year previously, was admitted to our hospital because of facial edema and chest discomfort. On auscultation, a continuous murmur was heard at the left lower sternal border. Computed tomography revealed dissecting aneurysm of the ascending aorta and a fistula to the left atrium was suspected. Transesophageal echocardiography showed the fistula between the false lumen of the aneurysm and the left atrium. Ascending aorta replacement and closure of the fistula was performed. There was dense adhesion between the aortic root and the roof of the left atrium. It seems that postoperative adhesion plays an important role in formation of aortocameral fistula.
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