Relationship Between LINQ™ Subcutaneous Impedance and Right-sided Hemodynamic Measurements

Inclusion Criteria:

- Patients meeting at least 1 of 3 criteria will be included in the study:

- Patients with symptomatic systolic or diastolic heart failure who in the
clinician's judgment have a high likelihood of undergoing serial right heart
catheterizations to aid in clinical management of their heart failure

- Patients with dyspnea on exertion in whom exercise hemodynamics is indicated to
diagnose diastolic dysfunction

- Patients who have or will be implanted with a pulmonary artery pressure monitor

- Patient is 18 years of age or older

- Patient (or patient's legally authorized representative) is willing and able to
provide written informed consent

- Patient is willing and able to comply with the protocol, including follow-up visits
and Carelink transmissions.

Exclusion Criteria:

- Patient has an existing Medtronic implantable cardiac device

- Patient has a left ventricular assist device (LVAD)

- Patient is pregnant (all females of child-bearing potential must have a negative
pregnancy test within 1 week of enrollment)

- Patient is enrolled in another study that could confound the results of this study,
without documented pre-approval from a Medtronic study manager