title: Antibradycardia pacing in patients with congenital heart disease: experience with automatic threshold determination and output regulation (Autocapture).
abstract: OBJECTIVE
  The purpose of this study was to reevaluate whether St Jude Medical's Autocapture algorithm (AC) with beat-to-beat capture confirmation, automatic pacing threshold determination and output adjustment can be applied to paced patients with congenital heart disease (CHD).
  
  
  RESULTS
  30 patients with CHD received a transvenous (group A: n=22) or epicardial (group B: n=8) single (n=7) or dual chamber (n=23) AC pacemaker for antibradycardia pacing. As a safe AC function is ensured only if a sufficient evoked response (ER) and a low lead polarization amplitude (LPA) are present, these parameters were reevaluated from 112 follow-up studies with respect to AC-function. In all but one transvenous system AC correctly functioned. AC was recommended in 5/8 patients with epicardial leads but correct AC function was preserved in only 3 patients.
  
  
  CONCLUSIONS
  These data suggest that the application of the AC algorithm is safe in patients with CHD when transvenous leads are used. Whether appropriate AC function is possible with epicardial leads needs individual verification.
authors.affiliation: Department of Congenital Heart Disease/Pediatric Cardiology, German Heart Institute Berlin, Berlin. nuernberg@dhzb.de
authors.forename: J-H
authors.initials: JH
authors.lastname: Nürnberg
authors.forename: H
authors.initials: H
authors.lastname: Abdul-Khaliq
authors.forename: P
authors.initials: P
authors.lastname: Ewert
authors.forename: P E
authors.initials: PE
authors.lastname: Lange
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000465:Algorithms; D001331:Automation; D001919:Bradycardia / Q000209:etiology* / Q000503:physiopathology / Q000628:therapy*; D002302:Cardiac Output / Q000502:physiology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D006330:Heart Defects, Congenital / Q000150:complications* / Q000503:physiopathology / Q000628:therapy*; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial; D015203:Reproducibility of Results; D012189:Retrospective Studies