Troponin I (cTnI) is a protein that is found in the heart muscle. When someone has a heart attack or other injury to the heart muscle, increased levels of cTnI can be measured in the blood and testing for cTnI in blood is used to help diagnose a heart attack and other heart conditions.

The purpose of this study is to evaluate the safety and effectiveness of ION-682884 and determine if it can help people with transthyretin-mediated amyloid cardiomyopathy (ATTR-CM) which is a disease caused by change in a protein called transthyretin (TTR). ION-682884 is an investigational drug. "Investigational" means that ION-682884 is not yet approved for use in any settings outside of clinical research studies like this one and is considered experimental. ION-682884 has been shown to reduce the level of TTR in the blood of animals and healthy volunteers tested to date. Reducing the amount of TTR in your blood may reduce the amount of amyloid deposits in your body and may keep your cardiomyopathy from getting worse over time. However, it is not known if ION-682884 will help your cardiomyopathy.

If you meet the requirements and agree to participate in this study, you will receive subcutaneous (under the skin) injections of either ION-682884 or placebo once every 4 weeks from week 1 through week 117.
Your participation in this study will last approximately 36 months and will consist of clinic visits and follow up visits at home.

Patients with cardiovascular disease (CVD) are at increased risk of depression following hospital discharge. Unfortunately, most depressed CVD patients do not receive appropriate care for their depression, often because they are unable to, or are fearful of traveling to providers for the regimen of 8-12 weekly visits of therapy such as Behavioral Activation (BA). This study will compare the effectiveness of BA for depression, delivered via Telehealth, to standard post-CVD hospital discharge best practices. It is predicted that patients who receive BA will have better mental health outcomes and will be less likely to be re-hospitalized compared to patients who receive standard post-discharge care.

This study is looking for volunteers who are having the Heart Mate 3 (HM3) Left Ventricular Assist Device (LVAD) implanted for treatment of heart failure. The study will collect medical information and patient experiences who have received treatment with the HM3. The traditional method to implant the HM3 is an incision in the middle of the chest through the breastbone (also called the sternum). This study will collect data if you have the Heartmate 3 implanted using a less invasive approach. Study participants will attend 8 visits over the course of 6 months.