| Reoperation for Aortic St. Jude
Medical Valves in Six Cases |
(Department of Cardiovascular Surgery, Hiroshima
City Hospital, Hiroshima, Japan)
| Takeshi Shichijo |
Osamu Oba |
Keizou Yunoki |
| Masahiro Inoue |
|
|
|
From 1982 to March 1999, 276 St.
Jude Medical prostheses were implanted in aortic position. Of
the 276 patients, 6(2.2%) required redo aortic valve replacement
due to aortic stenosis. The peak velocity measured by continuous-wave
Doppler echocardiography ranged from 3.5 to 5.4m/sec with mean
of 4.55m/sec. Aortic stenosis was attributable to pannus formation
in 3 patients, valve thrombosis in 1 patient, and prosthesis-patient
mismatch in 2 patients. The prostheses of patients with pannus
formation were implanted in valve orientation parallel to the
septum. It is therefore considered that the St. Jude Medical
prosthesis should be implanted perpendicular to the septum in
the aortic position and that careful follow-up observation of
the patients should be made, particularly with echocardiography.
Jpn. J. Cardiovasc. Surg. 30: 19-22 (2001) |
|
