title: Percutaneous transluminal mitral commissurotomy--experience with inoue balloon and over the wire technique.
abstract: OBJECTIVE
  To compare the immediate and long-term results, safety and complication profile of inoue balloon technique (IBT) and over the wire technique (OWT) in the treatment of rheumatic mitral stenosis.
  
  
  METHODS
  We have compared the IBT in 104 patients and OWT in 40 patients. Preprocedural, immediate post-procedure and follow-up echocardiograms of both groups of patients were done.
  
  
  RESULTS
  There was no statistically significant difference in the success rates between IBT and OWT (97% vs. 95%; p > 0.05), nor was there a difference in reduction in mean left atrial pressure, mean pulmonary artery pressure, the occurrence of significant mitral regurgitation, or mortality (p > 0.05). The cost per procedure was cheaper with OWT but the occurrence of sustained ventricular tachycardia (VT) during the procedure was more common with OWT. OWT uses a stiff guidewire for positioning the balloon across the mitral valve, which is not done in IBT, hence there is the possibility of left ventricular perforation--which in fact occurred in one of our patients. During a mean follow up period of 12.9 months for IBT and 13.5 months for OWT, there was no significant restenosis in both the groups. The advantage of the OWT was the cheaper cost of the balloon and comparable results with IBT despite longer fluoroscopy and procedural times and the increased incidence of arrhythmias during the procedure.
  
  
  CONCLUSIONS
  In a third world country like ours where escalating cost may be a deterrent in performing interventions, the OWT is a comparable alternative to IBT.
authors.affiliation: Department of Cardiology, Madras Medical College and Research Institute, Chennai, India.
authors.forename: P
authors.initials: P
authors.lastname: Thirumalai
authors.forename: D
authors.initials: D
authors.lastname: Prabhakar
authors.forename: M
authors.initials: M
authors.lastname: Anandan
authors.forename: A
authors.initials: A
authors.lastname: Manimarane
authors.forename: T
authors.initials: T
authors.lastname: Subramanium
authors.forename: R
authors.initials: R
authors.lastname: Alagesan
authors.forename: D
authors.initials: D
authors.lastname: Vaidiyanathan
mesh_terms: D000293:Adolescent; D000328:Adult; D015906:Angioplasty, Balloon, Coronary / Q000009:adverse effects*; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008946:Mitral Valve Stenosis / Q000628:therapy*; D017063:Outcome Assessment, Health Care; D011183:Postoperative Complications; D013997:Time Factors