A system and method for assessing pulmonary performance through transthoracic impedance monitoring is described. Transthoracic impedance measures are directly collected through an implantable medical device. The transthoracic impedance measures are correlated to pulmonary functional measures relative...http://www.google.de/patents/US7329226?utm_source=gb-gplus-sharePatent US7329226 - System and method for assessing pulmonary performance through transthoracic impedance monitoring
