title: Pneumopericardium with cardiac tamponade as a complication of cardiac pacemaker insertion one year after procedure.
abstract: BACKGROUND
  Lead dislodgement has been shown to be the most common complication in the first 30 days after pacemaker insertion. Although it is rare, pneumopericardium with tamponade can also result.
  
  
  OBJECTIVE
  We present a case of an extremely rare delay from cardiac pacemaker insertion to lead migration with resulting pneumopericardium and cardiac tamponade.
  
  
  METHODS
  A 65-year-old woman with a past medical history significant for congestive heart failure, chronic obstructive pulmonary disease, and third-degree heart block, requiring pacemaker insertion 2 years prior with a revision 1 year prior, presented to the Emergency Department complaining of sudden-onset pleuritic chest pain. Her work-up revealed a pneumopericardium with atrial pacemaker lead migration into the right middle lobe of the lung. She suddenly developed hypotension and respiratory distress and required pericardiocentesis and, ultimately, surgical repair for a perforated right atrium.
  
  
  CONCLUSIONS
  Pacemaker migration can lead to pneumopericardium and tamponade, even up to 1 year after placement.
authors.affiliation: Department of Emergency Medicine, Genesys Regional Medical Center, Grand Blanc, Michigan, USA.
authors.forename: Rory
authors.initials: R
authors.lastname: O'Neill
authors.forename: Marc
authors.initials: M
authors.lastname: Silver
authors.forename: Fahim
authors.initials: F
authors.lastname: Khorfan
mesh_terms: D000368:Aged; D002305:Cardiac Tamponade / Q000209:etiology* / Q000601:surgery; D002637:Chest Pain / Q000209:etiology; D005260:Female; D006325:Heart Atria / Q000293:injuries; D006335:Heart Injuries / Q000209:etiology / Q000601:surgery; D006801:Humans; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D011026:Pneumopericardium / Q000209:etiology* / Q000601:surgery; D011475:Prosthesis Failure; D019919:Prosthesis Implantation / Q000009:adverse effects*