title: Comparison of late outcome between Inoue balloon and double-balloon techniques for percutaneous mitral valvotomy in a matched study.
abstract: The follow-up results between Inoue balloon (n = 43, group 1) and double-balloon (n = 43, group 2) mitral valvotomies were compared in a patient-to-patient matched study. Matching was based on patients' age, mitral valve echo score, fluoroscopic calcification, mitral valve area before valvotomy, and follow-up period. The mean follow-up period was 13 +/- 9 months for both groups. At follow-up, 72% of patients were symptom free in each group; 2 (4.7%) patients in group 1 and 1 (2.3%) patient in group 2 underwent mitral valve replacement surgery. Of these 3 patients, 2 died after surgery, 1 from each group. The mitral valve area by Doppler was 1.8 +/- 0.3 cm2 in group 1 and 1.8 +/- 0.4 cm2 in group 2 (p = 0.7); the area by echo planimetry was 1.7 +/- 0.3 cm2 in group 1 and 1.8 +/- 0.3 cm2 in group 2 (p = 0.3) at follow-up. Restenosis occurred in 5 (12%) patients from each group. The cumulative restenosis-free rate was 96% at 1 years, 78% at 2 years, and 58% at 3 years in group 1 and 98%, 76%, and 51%, respectively, in group 2 (p = 0.8). Balloon selection did not appear to influence the clinical outcome at follow-up. We conclude that both the inoue balloon and the double-balloon valvotomies are effective therapies with comparable follow-up results for patients with mitral stenosis.
authors.affiliation: Department of Cardiology, White Memorial Medical Center, Los Angeles, CA 90033, USA.
authors.forename: H P
authors.initials: HP
authors.lastname: Zhang
authors.forename: H
authors.initials: H
authors.lastname: Gamra
authors.forename: J W
authors.initials: JW
authors.lastname: Allen
authors.forename: F Y
authors.initials: FY
authors.lastname: Lau
authors.forename: C E
authors.initials: CE
authors.lastname: Ruiz
mesh_terms: D000328:Adult; D000368:Aged; D002404:Catheterization / Q000295:instrumentation / Q000379:methods*; D016009:Chi-Square Distribution; D015150:Echocardiography, Doppler; D005260:Female; D005500:Follow-Up Studies; D006439:Hemodynamics; D006801:Humans; D008297:Male; D016555:Matched-Pair Analysis; D008875:Middle Aged; D008943:Mitral Valve / Q000000981:diagnostic imaging; D008946:Mitral Valve Stenosis / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000628:therapy*; D011379:Prognosis; D011446:Prospective Studies; D012008:Recurrence; D016896:Treatment Outcome