The **RESPONDER-HF Trial** is a study for people with heart failure (HF). **Heart failure** means the heart doesn't pump blood as well as it should. This study hopes to help people with certain types of HF by comparing a new treatment to a **sham** (fake) treatment. People will be grouped randomly, with some getting the treatment and others getting the sham. The treatment involves a small procedure to place a **Corvia Atrial Shunt**, which is like a tiny tube that helps blood flow better. Everyone in the study will have a small tube, called a sheath, placed in a vein in the leg. The study lasts 5 years, and people will have regular check-ups. After 2 years, people will find out if they had the real treatment or the sham. Key points: - **Duration**: 5 years, with check-ups - **Procedure**: Involves a minor heart procedure - **Eligibility**: Must have certain heart failure symptoms and be able to follow the study plan This study aims to find better ways to help people with heart failure feel better and live longer. If you join, you'll need to attend regular appointments and follow the study rules.