| Clinical Evaluation and Comparison
of the ATS Medical Open Pivot Prosthetic Valve and St.Jude's
Medical Prosthetic Valve in the Aortic Position |
| Teiji Jinno |
Mamoru Tago |
Hideo Yoshida |
| Masataka Yamane |
|
|
(Department of Cardiovascular Surgery, Kagawa Prefectural
Central Hospital, Takamatsu, Japan)
|
The valvular function after aortic
valve replacement was examined using Doppler echocardiography
and changes in serum lactate dehydrogenase (LDH) and free hemoglobin
levels were assessed. Data for the ATS Medical open pivot prosthetic
valve were compared with those of the St.Jude's Medical prosthetic
(SJM) valve, a similar bileaflet valve. These have been used
in the past 5 years. There were 23 patients with ATS valves (13
men and 10 women, with a mean age of 60.4±13.8 years) and 16
patients with SJM valves (10 men and 6 women, with a mean age
of 61.4±8.7 years). The left ventricular diastolic diameter index
(LVDdI), left ventricular systolic diameter index (LVDsI), %
fractional shortening (%FS) and left ventricular mass index (LVMI)
were determined by echocardiography. The peak pressure gradients
of the aortic prosthetic valves were calculated by a simplified
Bernoulli equation. Postoperative LVDdI, LVDsI and LVMI were
not significantly different in the ATS group and the SJM group.
However, the %FS of the ATS group was significantly higher than
that of the SJM group with aortic stenosis. The pressure gradients
at the aortic prosthetic valve position were not significantly
different between ATS and SJM valve in the 19-mm, 21-mm and 23-mm
size. Postoperative improvement or recovery of the serum LDH
level was observed significantly more frequently in the ATS group
than the SJM group (P<0.005). The free hemoglobin level
of the ATS group was also lower than that of the SJM group (P<0.005).
We demonstrated satisfactory valvular function of the ATS valve
compared with the SJM valve. Postoperative improvement of hemolysis
was observed significantly more frequently and more rapidly in
the ATS valves.
Jpn. J. Cardiovasc. Surg. 31: 183-186 (2002) |
|
