Impedance monitoring helps determine lead health by indicating which of the following?

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Impedance monitoring gauges the health of the lead contact by measuring the electrical resistance along the path from the device through the lead to the heart tissue. A normal impedance value means the lead is well seated and the tissue-contact is good, so the circuit is intact. If the impedance drifts outside the expected range, it suggests problems with the lead contact or the lead itself, such as poor tissue contact, lead fracture, or insulation issues. This focus on the electrical path at the lead tip explains why impedance monitoring is about lead contact health, not battery capacity, device memory status, or programmer compatibility.