06959214 is referenced by 101 patents and cites 39 patents.

An implantable device for measuring mechanical heart function of selected heart chambers using a heart contraction detection system that includes a magnetic field sensor. The system may be used for monitoring signs of acute or chronic cardiac heart failure, to enable diagnosis of the condition of the heart, to prescribe appropriate therapies, and to assess delivered pacing therapies. Distance measurements within the heart are made using the magnetic field sensor which is implanted at a sensor site in or on one of the right or left ventricle. A magnet implanted at a site relative to the other of the left or right heart ventricle is sufficiently spaced at a distance that fluctuates with expansion and contraction of the ventricles. The magnetic field sensor provides a sensor output signal having a signal magnitude proportional to the magnetic field strength of the magnet, and which is indicative of changing cardiac dimensions.

Title
Implantable medical device for measuring mechanical heart function
Application Number
9/996138
Publication Number
6959214 (B2)
Application Date
November 28, 2001
Publication Date
October 25, 2005
Inventor
Paul J Huelskamp
St. Paul
MN, US
Forrest C M Pape
New Brighton
MN, US
Agent
Girma Wolde Michael
Michael C Soldner
Assignee
Medtronic
MN, US
IPC
A61N 001/362
View Original Source