title: Minimally invasive video-assisted mitral valve repair: short and mid-term results.
abstract: OBJECTIVE
  Port-Access video-assisted surgery for mitral valve repair has become an alternative for mid-sternotomy. However, mid-term results are not yet available.
  
  
  METHODS
  Between February 1997 and December 1999, 121 patients underwent mitral valve surgery through a 4- to 5-cm right anterolateral thoracotomy using the Heartport endovascular cardiopulmonary bypass system; among these patients, 77 (57 males, 20 females; mean age 59 years; range 31-84 years) underwent mitral valve repair. Severe (4+) mitral regurgitation (MR) was seen in 63 patients (82%). Mean NYHA class was 2.5+/-0.4. Standard Carpentier mitral valve repair procedures were used in all patients; 11 received PTFE chordae for anterior leaflet prolapse.
  
  
  RESULTS
  Pathologies were degenerative (n = 69), chronic endocarditis (n = 4), annular dilatation (n = 3) and rheumatic (n = 1). Hospital mortality was 1.3% (n = 1). Two patients (2.6%) had conversion to sternotomy for aortic dissection caused by the Endo-Aortic Clamp. Nine patients (11%) underwent revision for bleeding. Mean cross-clamp and perfusion times were 103 min (range: 24-160 min) and 140 min (range: 75-215 min), respectively. Mean hospital stay was eight days (range: 4-36 days). During follow up (mean 31 months; range: 17-51 months) all patients improved their NYHA class; eight (11%) remained in class II. Left ventricular (LV) end-diastolic and LV end-systolic diameters decreased from 61+/-7.3 mm to 53+/-6.9 mm (p <0.01) and from 37+/-6.8 mm to 34+/-6.9 mm (p <0.05), respectively. Sixty-two patients (88%) had no or trivial MR, and nine (12%) had moderate MR (2+). There were two late valve replacements for endocarditis, and no late deaths.
  
  
  CONCLUSIONS
  Port-Access mitral valve repair constitutes a valid alternative to the standard procedure, and has good mid-term results. Video-assisted mitral valve repair appears to be safe and reproducible.
authors.affiliation: Department of Cardiovascular and Thoracic Surgery, Onze Lieve Vrouw Ziekenhuis, Aalst, Belgium.
authors.forename: P
authors.initials: P
authors.lastname: Schroeyers
authors.forename: F
authors.initials: F
authors.lastname: Wellens
authors.forename: R
authors.initials: R
authors.lastname: De Geest
authors.forename: I
authors.initials: I
authors.lastname: Degrieck
authors.forename: F
authors.initials: F
authors.lastname: Van Praet
authors.forename: Y
authors.initials: Y
authors.lastname: Vermeulen
authors.forename: H
authors.initials: H
authors.lastname: Vanermen
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D017548:Echocardiography, Transesophageal; D005260:Female; D005500:Follow-Up Studies; D006331:Heart Diseases / Q000209:etiology / Q000401:mortality; D006349:Heart Valve Diseases / Q000401:mortality / Q000601:surgery*; D019918:Heart Valve Prosthesis Implantation; D006801:Humans; D008297:Male; D008875:Middle Aged; D019060:Minimally Invasive Surgical Procedures; D008943:Mitral Valve / Q000000981:diagnostic imaging / Q000601:surgery*; D011138:Polytetrafluoroethylene / Q000627:therapeutic use; D011183:Postoperative Complications / Q000209:etiology / Q000401:mortality / Q000601:surgery; D012008:Recurrence; D012086:Reoperation; D013318:Stroke Volume / Q000502:physiology; D016019:Survival Analysis; D020775:Thoracic Surgery, Video-Assisted; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D011138:Polytetrafluoroethylene