Clinical Research Directory

DELINEATE-Prospective

Heart disease is the leading cause of death in the United States, and echocardiography (or "echo") is the most common way doctors look at the heart. Echo is safe, painless, and can detect major heart problems, including weak heart pumping and valve disease. Valve disease, especially aortic stenosis (narrowing) and mitral regurgitation (leakage), is common in older adults but often goes undiagnosed. While echo is the main tool for finding valve problems, it takes time, requires expert training, and results can vary between readers. Recent advances in artificial intelligence (AI), especially deep learning (DL), have shown promise in automatically analyzing heart images. However, past research hasn't fully tackled key echo techniques-like color Doppler and spectral Doppler-that are crucial for measuring how blood moves through heart valves. AI tools also face challenges in being used in everyday medical practice because of workflow issues, lack of real-world testing, and concerns about how the algorithms make decisions. At Columbia University Irving Medical Center, researchers have built a large database of heart tests over the last six years and developed AI programs to analyze echocardiograms. The current study will test whether providing AI analysis to cardiologists in real time during echo reading can make the process faster and more consistent.

ArcFlex Sheath in TAVR Trial

TAVR is a crucial treatment method for aortic valve diseases. The requirements for the device to cross the aortic arch and for the bioprosthetic valve to be coaxial are quite high, and they are key steps for the success of the surgery. Investigators' aim is to evaluate the safety and effectiveness of a variable-bend sheath for the TAVR procedure.

CT-evaluation of Coronary Ostia Height After Surgical Aortic Valve Replacement.

The goal of this interventional, single-center study is to demonstrate if there is a change in the coronary ostia height after surgical aortic valve replacement and if it depends on the type of prosthesis or surgical technique used. The study involves patients undergoing elective surgical aortic valve replacement with a bioprosthesis. Participants enrolled will undergo a CT scan before and after surgery (at least 90 days after surgery) to analyze coronary ostia height.

The Nordic Aortic Valve Intervention Trial 4 (NOTION-4)

A randomized clinical trial investigating the incidence and temporal dynamics of subclinical leaflet thickening by cardiac CT in transcatheter bioprosthetic aortic valves in patients randomised to different anti-thrombotic strategies. Additionally, this study aims to examine a possible association between HALT and thromboembolic events.

Allogeneic Valve Transplantation

Valves will be taken from hearts donated by organ donors, and implanted into patients who need a new heart valve.