What percent change in impedance should raise concerns regarding a pacing lead?

A change in impedance of 30% is significant and should raise concerns about a pacing lead. This threshold indicates that there may be issues such as lead migration, insulation failure, or other potential mechanical problems that could compromise the functionality of the pacing system. It is essential to monitor the impedance levels closely because detected changes beyond this 30% threshold can signify a risk to patient safety and the effectiveness of the pacing therapy.

Monitoring impedance is crucial in pacing management, as it provides insights into the integrity of the pacing lead and its connection to both the tissues and the pulse generator. When impedance changes are noted within this range, further evaluation and intervention may be warranted to ensure proper lead function and to prevent potential complications.