Active clinical trials for "Coronary Artery Disease"

Microvolt T-Wave Alternans (MTWA) is a relatively new non-invasive method for identifying patients at increased risk of sudden death from ventricular arrhythmias. MTWA can be measured during a routine exercise test, during pharmacologic stress or during cardiac pacing. Its clinical performance compares favorably with that of other non-invasive risk stratifiers and invasive electophysiologic studies. The purpose of the present study is to define the reproducibility of MTWA testing.

The purpose of this study is to determine whether the use of drug eluting stents is associated with higher rates of death, myocardial infarction, and major bleeding. In addition, the overall economic costs of implanting drug eluting stents compared to bare metal stents will be assessed.

The purpose of the study is to test accuracy of positive preejection velocity to predict left ventricular remodeling and long-term prognosis after revascularization in 200 patients with chronically dysfunctional myocardium. Patients will be followed for 3 years. Our hypothesis is that tissue-Doppler-derived analysis of positive preejection velocity allows to select optimal responders to revascularization; it means individuals with the greatest benefit in terms of LV remodeling and long-term prognosis.

Imaging the inside of coronary arteries (intravascular imaging) offers great insight into the assessment and treatment of coronary artery disease. Over time, substances such as fat, cholesterol and calcium can build up into 'plaques' in the arteries, causing narrowings or even blockages. These plaques can also rupture, causing cardiovascular events such as heart attacks or strokes. By using ultrasound and infrared technology, intravascular imaging can help assess these plaques, however this is an invasive technique involving angiography. Plaque composition, structure and stability can be affected by inflammation and the stress that the arteries are under. The investigators have pioneered novel minimally-invasive methods for modelling arterial stress using computed tomography coronary angiography (CTCA), as well as imaging coronary arterial inflammation using a positron emission tomography (PET) scan. Before embarking upon a large-scale clinical outcome study to determine whether these novel methods can improve risk prediction, the aim is to perform a proof-of-principle study to further develop our methodology for hybrid image analysis, and to validate this technique against high-resolution intravascular imaging as a surrogate marker of histology.

The DISENGAGE@rest study is a prospective registry carried out at Federico II University of Naples with the aim to evaluate the influence of the guiding catheter engagement within the coronary ostium on both FFR and non-hyperaemic pressure ratios values (such as Pd/Pa and the Resting Full-cycle Ratio -RFR), as well as the corresponding clinical impact on decision-making strategies. Consecutive patients with at least one intermediate stenosis (40%-90% by visual estimation) in any of the 3 main coronary arteries will be included.

The purpose of this study is to investigate the prognostic implication of pre-percutaneous coronary intervention (PCI) focal or diffuse disease patterns combined with post-PCI quantitative flow ratio (QFR).

Cardiovascular disease is a leading cause for morbidity and mortality in general population. The incidence of cardiovascular disease and their poor outcome is well documented in a broad spectrum of connective tissue diseases, especially in rheumatoid arthritis (RA). The risk of incident CVD is increased by 48% in patients with RA compared to the general population. RA is associated with 50% increase in the mortality in patients with cardiovascular disease (CVD). One reason is the more frequent cardiovascular risk factors in RA patients compared with the general population. Patients with RA have a high risk of premature cardiovascular disease (CVD). The aim of the present study is to assess whether there are non-invasive measures that might predict arteriosclerosis in RA patients.

Previous studies indicate that patients with cardiovascular disease have a variable response to aspirin. Despite treatment with aspirin a large number of patients suffer a myocardial infarction. This has given rise to the phenomenon "aspirin low-responsiveness". Laboratory aspirin low-responsiveness can be defined as the failure of aspirin to inhibit platelet production of thromboxane A2 or inhibit thromboxane-dependent platelet aggregation. Whether a low platelet response to aspirin results in an increased risk of future thrombotic events is of great clinical significance, but is still unknown. The investigators hypothesize that patients with a reduced response to aspirin, determined by platelet aggregation using the apparatus Verify Now Aspirin and Multiplate, have a higher risk of thrombosis. The purpose of this study is to investigate whether a higher incidence of cardiovascular events is found in patients with coronary artery disease (CAD) having a reduced biochemical response to aspirin compared with CAD patients having a normal biochemical response to aspirin. In addition to CAD, all patients have at least one of the following risc factors: previous myocardial infarction, type 2 diabetes mellitus and/or renal insufficiency.

The trial is a single centre, retrospective cohort, non-interventional study to be conducted in the department of cardiology, Chinese PLA General Hospital, Beijing, China. To evaluate the link between mean perioperative clinical heart rate and short-term composite outcomes during PCI among local CHD patients.

The multicenter study evaluates the diagnostic performance of coronary Computed Tomography Angiogram (CTA) with multi-slice computed tomography (MSCT) in comparison with X-ray coronary angiography and the factors affecting the accuracy of coronary CTA in diagnosing stenosis of coronary arteries. Furthermore, the study tends to establish the standard of image quality and associated factors that may ensure accurate diagnosis of coronary stenosis with coronary CTA.