title: Complications with the MICRA TPS Pacemaker System: Persistent Complete Heart Block and Late Capture Failure.
abstract: A Medtronic MICRA transcatheter pacing system (Medtronic, Minneapolis, MN, USA) was implanted in an 86-year-old patient with sick sinus syndrome and left bundle branch block after transfemoral aortic valve implantation. During implantation she developed a persistent complete heart block due to manipulation with the large-bore delivery catheter. Two weeks later, acute pacemaker dysfunction occurred due to massive increase of pacing threshold and impedance without obvious pacemaker dislocation or myocardial perforation. Recurrent capture failure was seen with pacing output set at 5 V/1.0 ms. Hence, microdislocation or fixation of the tines in the right ventricular trabeculae has to be assumed.
authors.affiliation: Department of Cardiology, Triemli Hospital, Zurich, Switzerland.
authors.forename: Niels
authors.initials: N
authors.lastname: Holm
authors.affiliation: Department of Cardiology, Triemli Hospital, Zurich, Switzerland.
authors.forename: Andreas
authors.initials: A
authors.lastname: Müller
authors.affiliation: Department of Cardiology, Triemli Hospital, Zurich, Switzerland.
authors.forename: Rainer
authors.initials: R
authors.lastname: Zbinden
mesh_terms: D000369:Aged, 80 and over; D001281:Atrial Fibrillation / Q000150:complications / Q000517:prevention & control*; D004562:Electrocardiography / Q000295:instrumentation*; D004868:Equipment Failure; D005260:Female; D006333:Heart Failure / Q000209:etiology* / Q000517:prevention & control; D006801:Humans; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D012804:Sick Sinus Syndrome / Q000150:complications / Q000517:prevention & control*; D017211:Treatment Failure
keywords: new technology; pacing