title: Transvenous cardioverter-defibrillator implantation in a patient with tricuspid mechanical prosthesis.
abstract: BACKGROUND
  A 64-year-old woman was referred to our center because of poorly tolerated ventricular tachycardia (VT) at 210 bpm due to an old myocardial infarction. The patient had been operated on at age of 20 for mitral valve commissurolysis, at age of 49 for ductal carcinoma, at age of 56 for mitral valve replacement, and at age of 61 for tricuspid valve replacement. Left ventricular EF was 31%. The patient was in permanent atrial fibrillation (AF) since the age of 53. She had undergone three cardiac surgery procedures, ending with two prosthetic mechanical valves. The cardiac surgery team advised against an epicardial ICD implantation.
  
  
  RESULTS
  We achieved a fully transvenous implant, with a screw-in defibrillation coil in the low right atrium and a bipolar pacing/sensing lead in a posterolateral branch of the coronary sinus. Pacing/sensing parameters were reliable, and effective defibrillation occurred at 20 J by a stepdown protocol. During 16-month follow-up, three VT episodes at 210 bpm were terminated by antitachycardia pacing (ATP) therapy. Left ventricular pacing/sensing was stable at long term.
  
  
  CONCLUSIONS
  Thanks to technologic improvements, transvenous ICD implantation is feasible and safe in patients with a tricuspid mechanical prosthesis.
authors.affiliation: Institute of Cardiology, University of Bologna, Via Massarenti 9, 40138 Bologna, Italy. mbiffi@aosp.bo.it
authors.forename: Mauro
authors.initials: M
authors.lastname: Biffi
authors.forename: Matteo
authors.initials: M
authors.lastname: Bertini
authors.forename: Matteo
authors.initials: M
authors.lastname: Ziacchi
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Boriani
mesh_terms: D017147:Defibrillators, Implantable; D005260:Female; D005500:Follow-Up Studies; D006349:Heart Valve Diseases / Q000150:complications / Q000601:surgery; D006350:Heart Valve Prosthesis; D006801:Humans; D008875:Middle Aged; D008943:Mitral Valve; D009203:Myocardial Infarction / Q000150:complications; D019919:Prosthesis Implantation / Q000379:methods*; D017180:Tachycardia, Ventricular / Q000150:complications / Q000628:therapy*; D016896:Treatment Outcome; D014261:Tricuspid Valve