Pacemaker

Hover on/off image to show/hide findings

Tap on/off image to show/hide findings

Pacemaker

  • Cardiac pacemakers are a frequently encountered artifact seen on chest X-rays
  • There are many different designs of pacemaker which may have one or two leads placed in the right heart chambers
  • The pulse generator (battery pack) is usually implanted in the retro-pectoral space on the left side of the anterior chest wall

Pneumothorax following pacemaker insertion

Hover on/off image to show/hide findings

Tap on/off image to show/hide findings

Pneumothorax following pacemaker insertion

  • After pacemaker insertion a chest X-ray is used to check for a pneumothorax

Implantable cardioverter defibrillator

Hover on/off image to show/hide findings

Tap on/off image to show/hide findings

Implantable cardioverter defibrillator

  • Implantable cardioverter defibrillators (ICDs) have a similar appearance to pacemakers
  • The ventricular lead has two thicker segments – these are the shocking electrodes which automatically defibrillate the heart if an arrhythmia is detected
  • The proximal shocking electrode is located in the superior vena cava and left brachiocephalic vein
  • The distal shocking electrode is located in the right ventricle