This study is enrolling participants who are already implanted with a S-ICD device (Subcutaneous Implantable Cardioverter Defibrillator, which is a device designed to monitor heart rhythms and deliver a shock to the heart to stop life threatening heart rhythms), and are undergoing a routine outpatient clinic follow up appointment to have their S-ICD checked. The aim of the study is to see if a feature in the device can recognize muscle movement and differentiate movement from irregular heart signals. The study involves doing some simple arm exercises while collecting device data, both with this feature turn on and then with it turned off. Participants will be randomized to either have the feature turned on or off initially then it will be programmed the alternative way and the same exercise testing will be repeated. The study will involve just one visit.

The purpose of this study is to determine if patients with heart failure (HF, meaning a weak heart) with left ventricular ejection fraction (LVEF) ≤ 50% and with an abnormal heart beat can benefit from having pacemaker leads placed in a different location in the heart. We know that people with a weak heart and an abnormal heart beat can benefit from having a pacemaker. Participants in this study will be randomly assigned (like flipping a coin) to one of two treatments (A or B), both of which are standard of care heart pacing treatments:
A. Pacing the heart from two locations in the left ventricle (lower left chamber of the heart)
B. Pacing the heart from one of two other places in the heart (the "His" or the left bundle branch)

The purpose of this study is to compare side by side these two treatments and evaluate if one is better than the other.

This study is enrolling patients diagnosed with New York Heart Association (NYHA) Class II and III Heart Failure (HF). The main purpose of this study is to investigate the safety and effectiveness of the study device in helping to reduce Heart Failure Hospitalizations (HFH). The study is divided into 3 time periods: a screening period, implant/treatment period, and a follow-up period.

The study involves implanting a Cordella™ Pulmonary Artery Sensor during a right-heart catheterization, after which, you will be randomized into the treatment group (your study doctor will use the data from your daily weight, blood pressure, heart rate measurements, and your daily sensor readings to treat your heart failure) or the active control group (your study doctor will only use the data from your daily weight, blood pressure, and heart rate measurements to treat your heart failure). You will have a 66% (2 in 3) chance of being in the treatment group and a 33% (1 in 3) chance of being in the active control group. Randomization is much like a like drawing straws where you have a 66/33 chance of being assigned to the treatment group or the active control group.

After you have been implanted for 6 months, you and your study doctor will be "unblinded" (able to see) the daily measurements from the Cordella™ Pulmonary Artery Sensor System. Follow-up visits will occur at 1, 3, 6, 12, 18, and 24 months, then annually up to 5 years.

Risks include complications from the implant procedure (bleeding, infection, damage to blood vessels, allergic reactions), risks from contrast dye, anesthesia, or medications (e.g., bleeding from blood thinners), and potential unknown device-related risks.

This study is enrolling participants with risk factors for heart or blood vessel events (e.g. heart attack, stroke, etc) who also have an elevated lipoprotein a (Lp(a)), which is a sticky particle in the blood that carries cholesterol. The first part of the study involves testing the Lp(a) level and if elevated then participants will be invited to be a part of a study testing the investigational medication olpasiran. Investigational means it has not been approved for commercial use by the Food and Drug Administration. The study medication is given as a shot just under the skin every 3 months. This study is a randomized study meaning participants are assigned by chance to either receive olpasiran or placebo. Placebo looks like the real medication but has no active ingredients. Participants have a 50:50 chance of being assigned to either group but will not know which group they are in. Study related procedures include physical exams, blood work, vital signs, electrocardiogram (ECG - a tracing of the heart's electrical activity) and study medication administration. This study is expected to last about three and a half to five and a half years and involve between 16 to 28 visits.