A system and method for assessing cardiac performance through transcardiac impedance monitoring is described. Intracardiac impedance measures are directly collected through an implantable medical device. The intracardiac impedance measures are correlated to cardiac dimensional measures relative to performance...http://www.google.com/patents/US7488290?utm_source=gb-gplus-sharePatent US7488290 - System and method for assessing cardiac performance through transcardiac impedance monitoring
