Related Experiment Video
Updated: Jul 16, 2026

Full-root Aortic Valve Replacement by Stentless Aortic Xenografts in Patients with Small Aortic Roots
Published on: May 21, 2017
Aortic root subadventitial hematoma
Shinji Miyamoto1, Tetsuo Hadama, Eriko Iwata
1Department of Cardiovascular Surgery, Faculty of Medicine, Oita University, Hasama-machi, Oita 879-5593, Japan. smiyamot@med.oita-u.ac.jp
Abstract:
A 51-year-old woman was operated on for aortic valve regurgitation 3 months after experiencing chest tightness awakening her from sleep. Intraoperative findings included turbid dark brown pericardial fluid and a nipple-shaped protrusion on the external aspect of the noncoronary sinus of Valsalva. Histologically, the lesion was enclosed by intact media and adventitia, and represented an organized hematoma. Dilated venules noted adjacent to the lesion were suggestive of an intramural hemangioma. The etiology of this lesion is unclear, but it might be an unusual type of intramural hematoma (IMH) and gives us a hint of an origin of IMH.
Related Concept Videos
Aneurysm III: Interprofessional Care
Aneurysm II: Clinical Manifestations and Diagnostic Studies
Aortic Regurgitation I: Introduction
Aneurysm I: Introduction
Aortic Regurgitation II: Clinical Features and Diagnostic Tests
Aortic Regurgitation III: Medical Management

