Aortic Valve Replacement Following Infectious Endocarditis Requiring Re-Operation Three Times

(Department of Cardiovascular Surgery, Rakuwakai Otowa Hospital, Kyoto, Japan and Department of Cardiovascular Surgery, Kyoto University*, Kyoto, Japan)

Nozomu Sasahashi Kazunobu Nishimura* Nobushige Tamura
Koji Ueyama
A 47-year-old man with active aortic valve endocarditis underwent direct closure of a paraannular abscess and valve replacement. Methicillin-resistant Staphylococcus aureus was isolated from his blood culture preoperatively. Because of a postoperative paravalvular leak (PVL) and an echo-free space suggesting a residual cavity, he was reoperated for patch closure of the aneurysm and prosthetic valve replacement. However, the PVL and paraannular cavity were still observed after the 2nd surgery. At the 3rd operation, prosthetic valve detachment along one fourth of its circumference was confirmed, and the cavity was fully opened. A patch was used to cover the pseudoaneurysm and was placed under the orifice of the left coronary artery. This patch repair of the cavity was accomplished, followed by prosthetic valve replacement in situ. Trivial PVL was identified after the operation, and a diagnosis of intravascular mechanical hemolysis was made. Clinical examination revealed partial detachment of the prosthetic valve resulting in a significant PVL and paraannular pseudoaneurysm. Because of unremitting hemolysis and the increased PVL, the patient underwent a 4th repair. Inspection showed that the prosthetic valve was partially detached and the defect was opened at the upper edge. The orifice of the aneurysmal was covered, and valve replacement was performed in the supraannular position using 3 U-stays, which were passed through both the aortic wall and the patch, followed by ascending aortic graft replacement. In the case of aortic valve endocarditis with paraannular involvement, radical debridement and complete reconstruction of the left ventriculoaortic discontinuity without tension are required.
@Jpn. J. Cardiovasc. Surg. 33: 182-184 (2004)