Active clinical trials for "Myocardial Ischemia"

This study is a prospective, observational study to estimate the relationship between dosage of clopidogrel and platelet aggregation in Chinese with different genotype. The investigators suppose both pretreatment dosage of clopidogrel before percutaneous coronary intervention (PCI) and CYP2C19 genotype may effect the platelet aggregation as well as clinical outcome.

The protein composition of HDL is complicated. The investigators have identified 40 distinct proteins associated with HDL by proteomics technology, and these proteins have been confirmed to be related to the function of anti-inflammation, anti-oxidation, improvement of endothelial function, inhibition of thrombosis and so on. And the investigators also found that the levels of some proteins in HDL changed in patients with coronary heart disease, compared with the healthy control group. So, this study is to conduct in the two following aspects: enlarge the sample size to verify the preliminary results to find new research ideas of pathogenesis and biomarkers for coronary heart disease; and study the changes of HDL protein composition in patients with coronary heart disease before and after statins treatment using proteomics technology in order to find the mechanism of statins pleiotropic effects and indicators for evaluating the treatment effectiveness.

This registry is a clinical post-market evaluation of the Orsiro LESS in subjects requiring coronary revascularization with Drug Eluting Stents (DES).

Omacor®/Lovaza® is an effective, and very safe mix of PO-3A, and the drug is currently approved by the Federal authorities for the drug management of post-infarction patients with high blood triglycerides. Given the growing length of CAD progression, it is pertinent that many more patients will yield extra benefit from Lovaza® on top of aggressive antiplatelet regimens and statin due to severity of their vascular disease. Therefore, mild antiplatelet properties of PO-3A will be a highly desirable and attractive commodity of this medication. The investigators believe that Omacor®/Lovaza® is ideally positioned for the chronic management of CAD as a safe, efficient, and "gentle" agent with no harmful interactions with statins or aspirin. The investigators hypothesize that addition of Omacor may add mild antiplatelet protection for CAD patients. The study objectives are: To assess the ex vivo effects of Omacor® on platelet function in patients with coronary artery disease (CAD). To compare ex vivo platelet-related effects after 7 and 14 days of therapy with Omacor and statin combination versus statin alone in patients with chronic stable coronary heart disease. To establish the relation of changes in platelet activity (if any) with the lipid profile to prove an additional benefit of Omacor® on top of statin and aspirin.

The recognition of the association between circulating C-reactive protein (CRP) levels and risk of coronary heart disease (CHD) has led to an increased emphasis on CRP genetic effects on CRP level and CHD. However, the causality of CRP variants remains uncertain.The objective of this study is to evaluate the association of CRP gene variants and CRP levels in CHD in Chinese Han population. We conduct case-control study in CRP-Han study participants. The common single-nucleotide polymorphisms (SNPs) in the CRP gene, haplotypes, and plasma CRP levels are detected. A Mendelian randomization analysis will be used to help test the likelihood of causal association of gene-CRP levels, CRP levels-CHD and gene-CHD. The investigators hypothesize that CRP gene variants influence the protein level and may participate in CHD progress.

Objective: The purpose of the present study is to assess if perioperative variation of Brain Natriuretic Peptide (BNP) levels is a predictor of mortality and morbidity after cardiac surgery.Material and Methods: 500 consecutive patients will be enrolled prospectively in this study before cardiac surgery under cardiopulmonary bypass. BNP levels will be measured prior to surgery and at postoperative day 1. Variations of BNP levels will be analyzed to determine if it is a predictor of mortality and morbidity after cardiac surgery. This dynamic evaluation will be compared to other tools of risk stratification in cardiac surgery as the EuroScore. All patients will be followed 3 years after the procedure. Hypothesis: Perioperative BNP variations may be more sensitive than pre- or postoperative BNP levels alone. Furthermore the perioperative homeostasis will be measured to assess its impact on BNP secretion during the perioperative period.

Background. Clinical benefits of cardiac resynchronization therapy (CRT) have been clearly demonstrated in heart failure (HF) patients with severe left ventricular (LV) dysfunction and wide QRS at surface electrocardiogram. However, there is a growing evidence that QRS duration poorly predicts responses to CRT, and that ~30% of patients do not experience any benefit from CRT when pre-implant dyssynchrony is defined according to electrocardiographic criteria. A number of echocardiographic criteria have been proposed to assess mechanical LV dyssynchrony, but at present there is no consensus on their use to predict response to CRT. Study Design. The Italian Multicenter PROject on echo assessment of left VEntricular (IMPROVE) dyssynchrony study is a prospective, multicenter, observational study aimed to assess feasibility and predictive power of mechanical dyssynchrony assessed by echocardiography in consecutive consenting patients candidate to CRT by clinical and electrocardiographic criteria. IMPROVE will enroll 120 healthy subjects and 216 HF patients in 6 sites in Italy. CRT response criteria will be based on improvement in NYHA class and LV reverse remodeling evaluated by 3D-echocardiography. Enrollment is expected to conclude early 2009. Implications. CRT is today part of the therapeutic armamentarium for symptomatic HF patients refractory to medical therapy, with wide QRS complex and severe LV systolic dysfunction. The IMPROVE study has been designed to evaluate reference values of indexes of ultrasound mechanical dyssynchrony that have been proposed in the literature and compare their ability to predict response to CRT in HF patients.

The main purpose of this study is to examine the contribution of personality traits to marital satisfaction and well -being among couples coping with Coronary Heart Disease (CHD) and couples from the general population, and to health promoting behaviors and physical recovery among the ill partners.

The trial will investigate the accuracy of Dual Source CT coronary angiography to detect coronary artery stenoses in patients with chest pain who have, based on clinical criteria, an intermediate likelihood for the presence of coronary artery stenoses. No beta blockers will be used to lower the heart rate for the examination. The hypothesis is that Dual Source CT will allow the detection of vessels with at least one coronary artery stenosis with a sensitivity of more than 90%.

Coffee is a worldwide drink, been part of any culture. There are some concerns about effects of coffee on the health. Recently, epidemiological studies have shown benefits of coffee drinking to diabetics and also to prevent diabetes in populations. We aim to understand some effects of coffee and not only caffeine over vascular system, in special coronary artery disease patients, diabetics end normal people.