Patent Number: 6,490,486

Title: Implantable cardiac stimulation device and method that monitors displacement of an implanted lead

Abstract: An implantable cardiac stimulation device and method that monitors displacement of a cardiac lead implanted in a heart. The device includes an impedance measurement circuit that generates a template representing the impedance measured using the lead over a cardiac cycle of the patient's heart. The impedance measurement circuit generates subsequent impedance measurement signals, which are then compared to the template to derive a comparison factor. The comparison factors are stored in a memory and are indicative of lead displacement. A telemetry circuit transmits the comparison factors to a non-implanted receiver for analysis of lead displacement.

Inventors: Bradley; Kerry (Glendale, CA)

Assignee: Pacesetter, Inc.

International Classification: A61N 1/08 (20060101); A61N 001/04 (); A61N 001/18 ()

Expiration Date: 12/03/2019