Evaluation of Multisensor Data in Heart Failure Patients With Implanted Devices

Inclusion Criteria:

Age 18 or above, or of legal age to give informed consent specific to state and national law
Willing and capable of returning for all follow-up visits and emergency care at the investigational center as medically appropriate
Willing to participate in all testing associated with this clinical investigation at an approved clinical investigational center
Currently implanted with a COGNIS device (Model N119 or N120, P107, P108)
Classified as NYHA Class II, III or IV within the last six months

Exclusion Criteria:

Inability or refusal to sign the Subject Informed Consent
Inability of refusal to comply with the follow-up schedule
Documented as pacemaker dependent
Unable to rest comfortably in a semi-recumbent position for up to 20 minutes
Implanted with active Medtronic Fidelis lead models: 6930, 6931, 6948 or 6949
Currently implanted with unipolar RA, RV, or LV leads
LV sensitivity programmed to less than 0.7 mV AGC
History of appropriate tachycardia therapy (external or implanted) for rates < 165 bpm within 1 week prior to enrollment
Device battery status indicates approximate time to explant < 2 years
Likely to undergo lead or PG revision during the course of the study as determined by the investigator
Receiving regularly scheduled intravenous (IV) inotropic therapy as part of their drug regimen
Have received heart or lung transplant
Receiving mechanical circulatory support
Patients who have been referred or admitted for Hospice care
A life expectancy of less than 12 months per physician discretion
Enrolled in any concurrent study without Boston Scientific written approval
Devices previously converted to the SRD-1 and withdrawn from the study
Received a sub-pectoral COGNIS implant prior to February 1, 2011 with a dash number listed in Appendix K of the study protocol
Known pregnancy or plan to become pregnant within the course of the study
LV offset is programmed to a value greater than zero