[Short- and long- term results of percutaneous balloon valvuloplasty in pulmonary valve stenosis].
OBJECTIVE
To assess the long-term results of percutaneous balloon valvuloplasty at a single institution.


METHODS
This study comprised 189 patients with pulmonary valve stenosis undergoing percutaneous balloon valvuloplasty from 1984 to 1996, whose mean age was 7.97+/-9.25 years. The procedure was classified as successful when the RV-PA gradient was reduced to levels < 36 mmHg; restenosis was indicated by RV-PA gradients > 36 mmHg after an effective procedure.


RESULTS
After the procedure, the peak-to-peak transvalvular gradient decreased from 70.12+/-30.06 to 25.11 +/-20.23 mmHg (P<0.001). Immediate success was obtained in 148 (78.72%) patients. A later reduction in the gradient to values < 36 mmHg was obtained in 24 other patients previously categorized as unsuccessful. Therefore, percutaneous balloon valvuloplasty was considered effective in 172 (91.01%) patients. Effectiveness increased to 93.53% (159/170) in the cases of typical morphology. Follow-up ranged from 4.39+/-3 years to 13.01 years. Restenosis was observed in 24 (13.95%) patients. Pulmonary regurgitation was detected in 95.1% of the patients, being more intense than mild in 29.5% of the patients. The probability of maintaining an appropriate result, at any time point, with no restenosis was 92.29% in 2 years, 87.38% in 5 years, 82.46% in 8 years, and 64.48% in 10 years.


CONCLUSIONS
Percutaneous balloon valvuloplasty was effective and safe for the treatment of pulmonary valve stenosis with excellent short- and long-term results.
Hatem
Domingos M
DM
Instituto de Cardiologia, RS/Fundação Universitária de Cardiologia. pesquisa@cardnet.tche.br
Castro
Iran
I
Haertel
José Carlos
JC
Rossi
Raul I
RI
Zielinsky
Paulo
P
Leboute
Flávio C
FC
Pomar
Nara
N
Winckler
Maristela
M
Kersten
Rogério N
RN
Cardoso
Carlos Roberto
CR
Gottschall
Carlos A M
CA
D000293:Adolescent; D000328:Adult; D001794:Blood Pressure; D002404:Catheterization / Q000379:methods*; D002648:Child; D002675:Child, Preschool; D015331:Cohort Studies; D015150:Echocardiography, Doppler; D005260:Female; D005500:Follow-Up Studies; D006439:Hemodynamics; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D011666:Pulmonary Valve Stenosis / Q000628:therapy*; D013997:Time Factors; D016896:Treatment Outcome