|Causes of Loss Integrity Stimulation Circuit at Electrode–Tissue Interface|
|Dislodgement and Displacement (Known Etiology)||Migration of the Lead (Unknown Etiology)|
|Electrode Misplacement||Trauma||Pulse Generator Migration||Corporal Growing||Reel Syndrome||Twiddler's|
|Mechanism||Electrode instability with tissue detachment||Traction shoulder injury||Loose connective tissue dissection associated with weight of pulse generator||Traction of pulse generator in relation to physical changes in chest size and shape secondary to physiological development||Possibly associated with the movement of the thoracic limb and a ratchet mechanism at level of suture sleeve|
|Time to diagnosis||Early|
|Usually early||Variable, usually early||Late|
|Age group affected||Any age||Any age||Elderly and children||Teenagers||Any age|
|X-ray||Minimal or no change (micro displacement)|
Displacement within or outside their original chamber (macrodisplacement)
Lead displacement within or outside their original chamber
|Slightly shortened Unwound at level of the pocket||Slightly shortened||Short|
Electrode migration outside of their original chamber wrapping the pulse generator in the pocket.
|1||Usually more than 1||Usually more than 1||Usually more than 1||Usually 1|
|Unchanged||Unchanged||Caudal displacement||Unchanged||Usually without change, but it appears rotated|
The white shadow in the drawings represents the original lead position.