Method and system for detecting dislodgement of an implanted right atrial endocardial lead using a sensing period derived from a ventrical lead

摘要

A system and method are provided for detecting dislodgment of a right atrial endocardial lead implanted within a heart right atrium wherein the lead includes an electrode. Heart activity of the right ventricle of the heart and heart activity with the endocardial lead electrode are sensed during a time period. The sensed heart activity is stored in memory. The stored heart activity is analyzed to establish a first time window from the sensed ventricle activity and a second time window spaced from and preceding the first time window. The heart activity sensed with the endocardial lead electrode during the first time window is then compared to the heart activity sensed with the endocardial lead electrode during the second time window. In another embodiment, whenever heart activity is sensed with the atrial endocardial lead during the first time period, the atrial endocardial lead is considered dislodged.