Bariatric surgery and a once-weekly glucagon-like peptide-1 medicine both cause major weight loss in teens, but their effects on mouth and gut bacteria and on damaged blood fats tied to metabolism are still unknown. This study will collect saliva, stool, and routine blood samples from adolescents before treatment and six months later to see how these…
We are conducting a research study on the effect of high insulin levels on the buildup of excessive liver fat ("fatty liver disease") in people at risk for type 2 diabetes. We are seeking adult volunteers, ages 18-65, who have obesity with a body mass index of 30-45, and have been diagnosed with, or are at risk for, prediabetes and metabolic…
We are researchers at Columbia studying the learning and decision making. We are looking for participants over the age of 18, who have been prescribed Trizepatide for weight loss. Participants will be asked to complete an MRI scan and play computer games. Participants earn $25 per hour. Help us understand how the GLP-1 agonists affect brain and cognition!
The Physiology of the Weight Reduced State (POWERS) is a national research study designed to discover and learn what happens to the human body after weight loss and to learn why some people regain their lost weight. Understanding why this happens could help health professionals improve strategies for successful weight loss maintenance after weight loss.…
The purpose of this study is to evaluate if genetic variations are associated with the amount of weight loss with diet and while taking an FDA-approved medication for weight loss. The participation lasts ten months and includes six in-person visits at CUIMC with blood sampling and questionnaires, virtual nutritional counseling, and taking an oral weight…
We are conducting a research study on how insulin controls blood sugar in both healthy people and those at risk of type 2 diabetes. We are seeking adult volunteers, aged 18-65, who have body mass indices either in the lean range (18-25 kg/m2) or in the obesity range (30-45 kg/m2) but who do not have prediabetes or diabetes. Participants will undergo a…
We are recruiting volunteers, aged 18-70, for a research study on the buildup of excessive liver fat ("fatty liver disease") in people with or at risk for type 2 diabetes because their bodies are resistant to the actions of the blood sugar-lowering hormone, insulin. To do this, we seek to temporarily induce or accentuate insulin resistance in 14…
We are seeking adult volunteers with body mass index in the obesity range (30-45 kg/m2) to come in for a single study visit where they answer some health questions and have a small volume of blood drawn (25 cc/1.7 tbsp). We will measure levels of the blood sugar-lowering hormone insulin as well as glucose (sugar), certain fats, and other molecules related…
You may want to join this study because your heart condition may respond to a device-based therapy called cardiac modulation therapy called the OPTIMIZER System. The OPTIMIZER INTEGRA CCM-D System, also known as a Cardiac Contractility Modulation Defibrillator, is an investigational device system that combines CCM therapy and ICD therapy into one device.…
The ALLEVIATE-HF study is a prospective, randomized, multi-site, interventional, investigational device exemption (IDE) study. The purpose of the study is to gain experience with utilization of an integrated device diagnostic-based risk stratification algorithm to guide patient care in subjects with NYHA class II and III heart failure. The study will…
We are doing this study to collect sensor and heart failure (HF) event data that will be used to develop and test new diagnostic (not providing therapy) features for the insertable cardiac monitor (ICM) systems. ICMs are small devices implanted under the skin and are now widely used for the long-term monitoring and detection of abnormal heart rhythms. ICMs…
We're conducting a research study on how much insulin is needed to control blood sugar in people who are made temporarily resistant to insulin's effects. Insulin is the main hormone (chemical signal) that the body uses to lower the levels of sugar in the blood. We are interested in looking at insulin levels because we think that lowering insulin…
Although supraventricular tachycardia (SVT), including atrial flutter (AF), are the most common causes of intended in-utero fetal therapy, none of the medication used to date has been evaluated for their effects on the mother and her baby in a randomized controlled clinical trial (RCT). In the absence of such evidence, there is no consensus for the optimal…
The purpose of this research study is to understand if aspirin is needed in patients heart failure implanted with the HeartMate 3. Patients with devices like the HeartMate 3 take two blood thinner medicines, specifically warfarin and aspirin. Patients implanted with devices like the HeartMate 3 experience both clotting and bleeding complications. Data…
We are seeking adults with cardiovascular disease who identify as Black/African American or LatinX, and/or their caregivers, as well as community health workers working in primarily Black/African American or LatinX neighborhoods of NYC, to participate in a brief (30-minute) interviews over the phone or Zoom to discuss attitudes and perceptions related to…
The purpose of this research is to evaluate the safety and performance of an experimental system called the Aortix System. The system is being designed for use in patients hospitalized for a worsening of their heart failure symptoms and who also show signs of strain on their kidneys. The Aortix System includes a pump, which we hope may help the heart and…
The purpose of this study is to evaluate the NuPulseCV intravascular ventricular assist system (iVAS), a device similar to an Intra-aortic Balloon Pump (IABP) that helps circulate blood from the heart throughout the rest of the body. This study aims to: (1) See if the iVAS improves your blood circulation (2) Better understand how the iVAS device could…
The purpose of the study is to characterize von Willebrand Factor (VWF) profiles in patients receiving HeartMate 3 (HM3) and compare them to HeartMate II (HMII) Left Ventricular Assist Device (LVAD).
This is a Phase 3 multi-center open label randomized clinical trial. The purpose of this study is to learnmore about which anti-rejection (or immunosuppressive) medications best protect infants, children,adolescents, and young adults after they have had a heart transplant. Two different drug regimens will bewill be compared. All of these drugs are FDA-…
Over time, children and young adults who have had a Fontan operation may find they are more tired, have difficulty breathing and cannot exercise as well as before. Currently, there are no approved medicines to prevent this decline. The purpose of this research study is to learn whether children who have had the Fontan operation can improve their ability to…