Cardiac conduction devices

Radswiki et al.

Implantable cardiac conduction devices are a very common medical device of the thorax, with over one million implanted in the United States of America alone.

There are two major types of cardiac conduction devicespacemakers and automatic implantable cardioverter-defibrillators (AICD/ICD), and these may be co-implanted as an ICD-pacemaker combination. Both have two major components:

  1. pulse generator (battery pack and control unit): most common placed subcutaneously in the infraclavicular area
  2. lead wires with electrodes for contact with the endocardium or myocardium
Pacemakers

Pacemakers may be temporary or permanent, with the latter commonly known by the acronym PPM (permanent pacemaker). 

There are some categories depending on the number electrodes and location of pacing:

Automatic implantable cardioverter defibrillators

AICDs are common cardiac devices designed for both patient monitoring and therapy in case of ventricular tachycardia or fibrillation. AICDs consist of various combinations of sensing and shocking electrodes. They are frequently combined with a pacemaker as a bundled system for the patient, treating both the patient’s established arrhythmia and also acting as a fail-safe system should ventricular fibrillation or ventricular tachycardia occur.

Some types of AICD have leads that are implanted in the subcutaneous soft tissues (i.e. outside the thoracic cavity) 5

Chest x-ray
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Article information

rID: 12188
Systems: Cardiac, Chest
Section: Gamuts
Synonyms or Alternate Spellings:
  • Permanent pacemakers (PPM)
  • Cardiac pacemakers
  • Automatic implantable cardioverter defibrillators (AICD)
  • ICD-pacemaker
  • ICD-PPM

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Cases and figures

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    Case 1: biventricular pacemaker
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    Case 2: dual chamber pacemaker
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    Case 3: retained pacemaker wire
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    Case 4: dislodged atrial lead
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    post exchange.
    Case 5: fractured insulation of leads
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    Case 6: temporary venous via femoral approach
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    Case 7: dual chamber pacemaker
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    Case 8: perforated lead
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    Case 10: DTGA, atrial switch procedure and pacemaker
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    Case 11: epicardial patch
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    Expiratory
    Case 12: complicated by pneumothorax
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    Case 13 : Medtronic chronicle lead
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    Case 14: subcutaneous AICD
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