Active clinical trials for "Myocardial Ischemia"

Evaluation of use of ranolazine in patients with stable heart pain with cardiac magnetic resonance imaging (CMRI) and phosphorous-31 magnetic resonance spectroscopy (31P MRS). Subsequent testing using these modalities will show improved oxygen to the heart muscle.

There are many risk prediction models. And their estimates are different. This study aimed to investigate the differences between the estimates of Fuwai and Reynolds risk model in Chinese, and investigate the reason for the differences.

The goal of the Clinical Decision Support (CDS) Consortium research study is to assess, define, demonstrate, and evaluate best practices for knowledge management (KM) and CDS in healthcare information technology across multiple ambulatory care settings and electronic health records (EHR) technology platforms. There are seven specific research objectives focusing on two practical areas of implementation for clinical decision support services: a) healthcare maintenance and preventive care screening, and b) two chronic disease conditions: Coronary Artery Disease (CAD), and Adult-onset Diabetes Mellitus (AODM). The research objectives are: 1) Knowledge management lifecycle, 2) Knowledge specification, 3) Knowledge portal and repository, 4) CDS knowledge content and public web services, 5) CDS Dashboard, 6)Evaluation, and 7) Dissemination.

To study the role of Vigileo monitor using the FloTrac sensor to measure cardiac output using the pulse contour analysis as well as central venous oxygen saturation monitoring as a guide for tissue perfusion. The accuracy of the Vigileo monitoring was compared with the conventional thermodilution method for measuring cardiac output using the pulmonary artery catheter and mixed venous oxygen saturation for assessing global tissue perfusion.

Patients receiving BNP or nitroglycerin (IV) during the angioplasty procedure. 24 h after the procedure, vascular reactivity will be re-examined using the brachial artery flow-mediated dilatation study. Blood assays for ET-1, pro-BNP, and various inflammatory markers will be checked before and 24 h after the procedure. It is our hypothesis that endothelial function will be better in the BNP treated patients compared to the NTG treated patients

It would be useful to study coronary arteriovenous difference of various markers in patients who are undergoing coronary angiography for suspected coronary artery disease. Environmental and genetic factors may play a role in the progression of coronary artery disease. The goal of this project is to establish a series of cross-sectional / case-control studies to evaluate risk factors of coronary artery disease in China.

Vegetarian and vegan diets have been shown to reduce cardiometabolic risk factors for chronic diseases, such as cardiovascular disease and diabetes, and have been associated with decreased risk of these chronic diseases. The role of vegetarian and/or vegan dietary patterns and incident cardiovascular outcomes still remains unclear. To address these uncertainties, the investigators propose to conduct a systematic review and meta-analysis of the totality of evidence from prospective cohort studies to distinguish the association of vegetarian and/or vegan dietary patterns on the prevention and management of cardiovascular diseases. This proposed knowledge synthesis was commissioned by the Diabetes and Nutrition Study Group (DNSG) of the European Association for the Study of Diabetes (EASD) and will be used to inform clinical practice and dietary guidelines, help improve health outcomes, and guide future research design.

Prospective, observational multi-center registry to be conducted at up to 25 French interventional cardiology centers. Patients will be eligible once they have received at least one BioFreedomTM DCS as per standard clinical practice and will be followed for up to 2 years post PCI for data collection. The purpose of the registry is to explore the safety and effectiveness of the BioFreedomTM DCS in standard clinical practice in France and to serve as part of Post Market Surveillance.

Obstructive sleep apnea (OSA) is an increasingly common chronic disorder in adults. Compared to the general population, OSA occurs more often in patients with coronary artery disease (CAD), with a reported prevalence of 38% to 65%. Emerging evidence indicates OSA initiates and exacerbates coronary atherosclerosis. Moreover, several observational studies indicate the presence of OSA was associated with higher rate of restenosis and repeat revascularization (mainly attributed non-culprit lesion revascularization) after percutaneous coronary intervention (PCI). OSA might initiate endothelial injury by repetitive bursts of sympathetic activity that occur with apneas and hypopneas. Moreover, untreated OSA reduces endothelial repair capacity. Whether OSA could exacerbate neointimal proliferation and plaque progression in the non-culprit lesion after drug-eluting stent (DES) implantation remains less studied. The investigators aimed to evaluate neointimal proliferation and strut coverage within stent segment as well as changes of plaque volume and morphology in the non-culprit lesion by optical coherence tomography (OCT) in patients with versus without OSA at 12-month follow-up.

In a cohort of symptomatic patients referred to coronary computed tomography angiography (CCTA), the investigators aim is: To investigate and compare the diagnostic precision of Rubidium Positron Emission Tomography (Rb PET) and 15O-water PET (15O-water PET) in patients where CCTA does not exclude obstructive coronary artery disease (CAD) using invasive coronary angiography with fractional flow reserve (ICA-FFR) as reference standard. To study the diagnostic accuracy and prognostic value of computed tomography fractional flow reserve (CT-FFR) in patients where CCTA does not exclude obstructive CAD with ICA-FFR as reference standard. To validated a pre-test probability model including genetic and circulating biomarkers. To identify and characterize genetic risk variants and circulating biomarkers importance in developing CAD. To evaluate the bone mineral density in the hip and spine and correlate this to the degree of vascular calcification.