| Long-Term Results of Aortic Valve
Replacement Using a 19mm Bileaflet Valve |
| Takashi Adachi |
Masayoshi Yokoyama |
Kunihiro Oyama |
| Hiromi Kuwata |
Takako Matsumoto |
Yutaka Miyano |
| Takamasa Onuki |
Sumio Nitta |
|
(Department of Surgery I, Tokyo Women's Medical
University School of Medicine, Tokyo, Japan)
|
We studied cardiac function and
outcome long after aortic valve replacement using a 19mm bileaflet
valve. The subjects consisted of 10 of 12 patients living 10
or more years after the operation and 7 of 8 living 5-9 years
after the operation. We measured the left ventricular ejection
fraction (LVEF), %fraction shortening (%FS), left ventricular
diastolic dimension (LVDd), systolic dimension (LVDs), PWT, IVST,
and LV-aortic pressure gradient (PG) of in 6 patients each in
10 more years after the operation (Group I) and 5-9 years after
the operation (GroupII) who underwent ultrasonography, and calculated
the left ventricular mass index (LVMI). No statistically significant
differences were seen in either parameter in either group. Prognosis
was 1 cardiac 2 cancer deaths each in 10 or more years after
the operation group. The cumulative survival rate was in 85.7%
post operative 5-9 years and 72.7% in 10 years. Although cardiac
function was maintained in both groups, more observation is needed
from now on because the pressure difference or LVMI may increase.
Jpn. J. Cardiovasc. Surg. 31：243-246 (2002) |
|
