This is a study to evalaute the device's safety, function, and effects on heart function, and clinical outcomes of using the Edwards APTURE system (study device) in subjects with heart failure.

Major study activities include 3 right heart catheterizations (RHC) with exercise, a computed tomography (CT) scan with contrast, multiple ultrasounds of the heart, labs, and other assessments. The length of subject participation in the study is 5 years and includes 11 research visits.

The information obtained from this study will show how safe and effective this approach is in treating the symptoms of heart failure. Alternative treatment for heart failure depends on the cause, but may include diet and exercise, managing stress, medication (such as medications to treat leg swelling, high blood pressure, or abnormal heart rate), participation in another research study or continuing with current medical therapy

This study will examine whether a baroreflex activation therapy device (a small pacemakers that are helpful in heart failure) is beneficial for left ventricular assist device (LVAD) patients. For patients who have a baroreflex activation therapy device and LVAD, we assess whether baroreflex activation therapy helps them feel better and have fewer symptoms. We will also look at whether it helps with recovery of their weak heart. Participation in this study will last 6 months and require 3 clinic visits. At each visit, a participant's symptoms will be assessed, they will have pictures of their heart taken to determine function, and bloodwork will be drawn.

Patients with systemic sclerosis (SSc) related pulmonary arterial hypertension (SScPAH) have a worse prognosis than those with idiopathic PAH. We have recently discovered that heart cells in SScPAH do not contract or squeeze as well as in other forms of pulmonary hypertension. However, the mechanism leading to this dysfunction is not understood. To better study this and in hopes of developing a future therapy, we plan to collect tissue samples via a heart biopsy at the time of a clinically indicated heart catheterization.