[Valve replacement with Macchi prosthesis].
OBJECTIVE
to evaluate the performance of a new ball valve prosthesis.


METHODS
set up of two groups of patients who underwent mitral valve replacement with two different prosthesis: the Macchi prosthesis under evaluation and the well known Starr-Edwards model prosthesis. The chi-square test was used to compare the results.


METHODS
Patients referred for valvular surgery.


METHODS
One group of 98 consecutive patients who underwent isolated mitral valve replacement with a Macchi prosthesis from January 1984 to June 30 1986 was compared to a matched group of 49 patients who received a Starr-Edwards prosthesis in the same period of time. Follow-up data were available from 99% patients in the Macchi group 96% in the Starr-Edwards group, with a mean follow-up time of 35.2 (2-57) and 42.9 (4-62) months, respectively.


RESULTS
There was no statistical difference in the incidence per 100 patients--month of prosthetic complications--thromboembolism, hemorrhagic events, prosthetic endocarditis, reoperation and mechanical failure.


CONCLUSIONS
In our experience and with the available follow-up data the Macchi prosthesis is a good cost effective option when there is indication for a ball valve prosthesis.
Pinho
P
P
Centro de Cirurgia Torácica Hospital de São João Porto.
Vouga
L
L
Torres
J P
JP
Machado
F
F
Graça
A
A
Barreiros
F
F
Nunes
R
R
Monteiro
V
V
Guerreiro
M
M
Gomes
M R
MR
D000328:Adult; D005069:Evaluation Studies as Topic; D005500:Follow-Up Studies; D006350:Heart Valve Prosthesis / Q000009:adverse effects / Q000401:mortality; D006801:Humans; D011474:Prosthesis Design; D015996:Survival Rate
Substituição valvular com proótese de Macchi.