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. 31F243-246 (2002)