Aortic valve aneurysm responsible for acute congestive heart failure and histological findings: A case report.

We experienced a case of acute congestive heart failure in a 73-year-old man who had been followed up due to mild-to-moderate aortic stenosis and moderate-to-severe aortic regurgitation. A huge aortic valve aneurysm was found to extend from his right coronary cusp to a left ventricular outflow tract, resulting in moderate subaortic obstruction and severe aortic regurgitation. Surgical repair was performed and a perforated aneurysm of right aortic cusp was identified. Histological examinations suggested that healed infective endocarditis was responsible for the formation of an aneurysm in the aortic valve. <Learning objective: Aortic valve aneurysm is an uncommon complication of infective endocarditis. The infective process of a cardiac valve is thought to augment valvular tissue injury, resulting in aneurysmal formation and perforation of the valvular aneurysm. We report an uncommon case of aortic valve aneurysm that was histologically suggested to be caused by subclinical infective endocarditis. The subaortic obstruction and aortic regurgitation were successfully treated using a surgical procedure.>.