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.