Active clinical trials for "Coronary Disease"

The investigators prognostic impact of coronary artery disease (CAD) and of percutaneous coronary intervention (PCI) in patients with indication of TAVI is controversial, particularly in elderly population where CAD and aortic stenosis (AS) are frequent and commonly coexisted. (1-2) The primary end point of this prospective study is to compare major cardiovascular event at one year of follow up in patients over 80 years with severe aortic stenosis who referred for TAVI with or without associated CAD. The investigators will also assess (secondary endpoint) the impact of PCI on symptoms, major events and quality of life using geriatric parameters. The study will be conducted in the University hospital of Montpellier between November 2020 and November 2022

Define a signature of gut microbiota composition and related metabolites in patients with ST-elevation myocardial infarction, non ST-elevation myocardial infarction and chronic coronary disease (CAD).

Aortic valve stenosis (AS) affects 2-7% of persons > 65 years, symptoms include: angina and dyspnea, dizziness and syncope. Coincidence of coronary artery disease (CAD), also presenting with angina and dyspnea, in patients with AS between 40 - 65% . Angina in AS caused by significant reduction of coronary flow reserve (CFR). CFR is the ratio of maximal flow increase in the coronary vessel bed during maximal hyperaemia (medically or exercise induced). FFR (fractional flow reserve) use in patients with AS potentially invalid due to dysfunctional CFR leading to potential undertreatment of CAD in these patients.CFR disturbance in AS mainly due to myocardial overload causing concentric hypertrophy, increased oxygen consumption and neurohormonal activation leading to increased vascular resistance. Current studies are investigating the validity of FFR and iFR in AS patients. Recent data demonstrate very good correlation between FFR and iFR derived values to PET myocardial perfusion imaging values in patients with no evidence of AS. Our study aims to investigate the diagnostic performance of FFR and iFR in intermediate-grade coronary stenosis in patients with severe aortic valve disease and correlate FFR- and iFR derived values with those extracted from PET-perfusion Imaging.

To determine the glucose regulation status of patients who were suspected to have CAD in central Taiwan.

The goal of this prospective observational study is to learn about in patients who need percutaneous coronary intervention for coronary artery disease. The main questions it aims to answer are: Fractional flow reserve according to coronary angiography findings after coronary artery balloon angioplasty Differences in fractional blood flow reserve before and after lesions between coronary balloon angioplasty using a scoring balloon and a regular balloon Participants will voluntarily consent to the study after being fully informed about the study and given ample opportunity to ask questions.

This study is being conducted to provide access to and collect test data for an established nuclear medicine diagnostic imaging test called Positron Emission Tomography (PET), using a specific radioactive drug called Ammonia N-13 (Ammonia), referred to simply as an Ammonia PET scan, which is used to visualize the blood flow through the blood vessels and into the heart muscle in order to identify areas of restricted blood flow within the heart. The scanner used in this study may be a stand-alone PET scanner or a PET/CT scanner, which combines the PET scanner and a Computed Tomography (CT) scanner into a single device. Unless otherwise stated in this consent form, the term PET will be used to refer to both stand-alone PET and PET/CT scanners. While physicians have used the Ammonia PET test for many years to visualize (image) the blood flow into the heart muscle (perfusion), it is now possible to also measure the flow of blood into the heart muscle. Research studies have demonstrated clinical value in reviewing the measured blood flow values in addition to reviewing the perfusion images of blood flow into the heart muscle. Therefore, this study will establish a database of a large number of Ammonia PET measured blood flow values to serve as a future reference.

PROPHET-FFR is a single center ambispective registry aiming to explore the impact of post-revascularization functional assessment on later outcomes.

The investigators propose to genotype males and females at age 40 years and older, who are asymptomatic and without known heart disease (N=2000). DNA from a blood sample will be genotyped for millions of genetic risk variants for CAD by Baylor College of Medicine Human Genome Sequencing Center Clinical Laboratory (HGSC-CL) in a CLIA-approved laboratory. The overall objective after 2 years is to determine if genetic screening for risk of CAD in asymptomatic men and women has the discriminatory power to detect those at highest risk who would potentially benefit most from appropriate primary prevention. It will also determine whether the GRS is appropriate for different ethnic and race groups such as Hispanics, African Americans and Whites, and to what extent those individuals knowing that they are at higher risk, are more likely to seek further advice on management of the risks (either through changes in lifestyle or therapy).

ULTRA is a multicenter, observational, retrospective registry, enrolling consecutive patients treated with ultrathin coronary DES (coronary stent with strut thickness < 70 um) for coronary bifurcation lesions, left main disease, chronic total coronary occlusion, and in-stent restenosis regardless of their clinical presentation. Target lesion failure (TLF a composite endpoint of cardiovascular death, target vessel myocardial infarction, target lesion revascularization and definite stent thrombosis) will be the primary end point, while its single components will be the secondary ones along with all-cause death, all acute myocardial infarction (excluding peri-procedural AMI), target vessel revascularization and BARC major bleedings (BARC 3-5). Due to the retrospective, observational nature of the registry, no formal sample size estimation is required. Patients complying with detailed inclusion criteria and with a minimum follow up of 6 months will be enrolled.

To evaluate the long-term clinical outcomes and prognostic factors in patients with coronary artery disease (CAD) undergoing invasive coronary angiography (ICA), intravascular imaging, or invasive physiologic assessment.