title: Randomized comparison of J-shaped and straight atrial screw-in pacing leads.
abstract: OBJECTIVE
  To study the importance of a J shape in atrial pacing leads.
  
  
  METHODS
  We compared in a randomized controlled study acute and chronic results with 2 steroid-eluting, polyurethane, screw-in atrial lead models that differ only in shape. A total of 208 patients were randomized to have implantation of either a straight atrial lead (n = 105) or a J-shaped atrial lead (n = 103). Patients were followed up for 1 year.
  
  
  RESULTS
  On implantation, there were no significant differences between leads in rates of failure to implant, implant measurements, number of attempts to achieve an acceptable position, and fluoroscopy times. Before discharge and at 3-month and 1-year follow-up, electrical measurements showed no statistical differences between leads. During the first year after implantation, there were 2.9% early dislodgments (< 1 week after implantation) and 2.9% late dislodgments in the straight lead group (5.9% rate of all dislodgments) vs no dislodgments in the J-shaped lead group (P = .01). There was a trend toward higher rates of exit block and lead malfunction in the J-shaped lead group. Rates of pericardial complications, subclavian/axillary thrombosis, and chronic atrial fibrillation were the same in both groups.
  
  
  CONCLUSIONS
  Both leads appear to have an equally favorable performance profile for 1 year of follow-up. The J-shaped lead seems to be more stable and have fewer dislodgments, although it may have a somewhat higher malfunction rate.
authors: Heart Institute, Sheba Medical Center, and Tel Aviv University, Tel Hashomer, Israel. mglikson@post.tau.ac.il
authors: M
authors: M
authors: Glikson
authors: E
authors: E
authors: Yaacoby
authors: S
authors: S
authors: Feldman
authors: D S
authors: DS
authors: Bar-Lev
authors: S
authors: S
authors: Yaroslavtzev
authors: C
authors: C
authors: Granit
authors: Z
authors: Z
authors: Rotstein
authors: E
authors: E
authors: Kaplinsky
authors: M
authors: M
authors: Eldar
mesh_terms: D000328:Adult; D000368:Aged; D002304:Cardiac Pacing, Artificial / Q000379:methods*; D004566:Electrodes; D004867:Equipment Design; D004868:Equipment Failure; D005260:Female; D006325:Heart Atria; D006801:Humans; D008297:Male; D010138:Pacemaker, Artificial; D011183:Postoperative Complications; D016019:Survival Analysis