Patent ID: 9351656
Filing Date: 2016-05-31
CPC Classification: A61B,A61N

Claim Text:
1. A system comprising: an implantable medical device; a non-implantable communication and processing device comprising: a transmitter that wirelessly transmits data to said non-implantable communication and processing device; an impedance processor that determines, based on said first electric signal and a first resulting electric signal measured over at least a portion of said atrium by a pair of electrodes of said multiple cardiac leads, atrial impedance data reflective of a cardiogenic impedance of said atrium during at least a sub-phase of at least one heart cycle and determining, based on said second electric signal and a second resulting electric signal measured over at least a portion of said ventricle by a pair of electrodes of said multiple cardiac leads, ventricular impedance data reflective of a cardiogenic impedance of said ventricle during said at least a sub-phase of said at least one heart cycle; a representation processor that estimates an atrial impedance representation based on said atrial impedance data and a ventricular impedance representation based on said ventricular impedance data; a condition processor that determines a condition of a valve of said heart based on said atrial impedance representation and said ventricular impedance representation; wherein said impedance processor determines, based on said first electric signal and said first resulting electric signal, atrial impedance data representing a cardiogenic impedance of said atrium during a diastolic phase and a systolic phase of said at least one heart cycle and determining, and based on said second electric signal and said second resulting electric signal, ventricular impedance data representing a cardiogenic impedance of said ventricle during said diastolic phase and said systolic phase of said at least one heart cycle; wherein said representation processor estimates i) a diastolic, atrial impedance representation based on said atrial aid impedance data reflective of said cardiogenic impedance of said atrium during said diastolic phase, ii) a systolic, atrial impedance representation based on said atrial impedance data reflective of said cardiogenic impedance of said atrium during said systolic phase, iii) a diastolic, ventricular impedance representation based on said ventricular impedance data reflective of said cardiogenic impedance of said ventricle during said diastolic phase and iv) a systolic, ventricular impedance representation based on said ventricular impedance data reflective of said cardiogenic impedance of said ventricle during said systolic phase; and wherein said condition processor is arranged for determining said condition of said valve based on i) said diastolic, atrial impedance representation, ii) said systolic, atrial impedance representation, iii) said diastolic, ventricular impedance representation and iv) said systolic, ventricular impedance representation; a representation comparator that compares i) said diastolic, atrial impedance representation with a reference diastolic, atrial impedance representation, ii) said systolic, atrial impedance representation with a reference, systolic, atrial impedance representation, iii) said diastolic, ventricular impedance representation with a reference diastolic, ventricular impedance representation and iv) said systoic, ventricular impedance representation with a reference systolic, ventricular impedance representation, and wherein said condition processor determines said condition of said valve based on said comparisons.