Active clinical trials for "Coronary Artery Disease"

Collect data on the use of the Angio-Seal Evolution Device in diagnostic and interventional patient populations.

The investigators' rationale was to evaluate whether a 64-slice CT scanner allows accurate measurement of computed tomographic changes in coronary artery flow profiles and whether CT flow measurements are suitable for classifying the significance and hemodynamic relevance of a stenosis and thereby supplement as a functional parameter for morphological stenosis analysis.

Cardiac stress testing with functional nuclear imaging is an invaluable technique in the diagnostic and prognostic evaluation of patients with known or suspected ischemic heart disease. Selection of the appropriate type of nuclear stress test: exercise stress Myocardial Perfusion Imaging (MPI) versus pharmacologic stress MPI is crucial for not only diagnostic accuracy and prognostic evaluation, but also for sound clinical decisions and resource utilization. The Duke Activity Status Index (DASI) is a 12-item questionnaire that utilized self-reported physical work capacity to estimate peak metabolic equivalents (METs) and has been shown to be a valid measurement of functional capacity. The investigators hypothesized that the DASI may be the screening tool that evaluates functional capacity and guides selection of the optimal stress MPI study.

High-dose dobutamine/atropine stress cardiac magnetic resonance imaging (DS-MRI) has been incorporated in daily clinical practice for the detection of ischemic heart disease. Thus, wall motion abnormalities (WMA) during stress, precede the development of ST-segment depression on ECG and of anginal symptoms and aid in the detection of anatomically significant coronary artery disease (CAD). DS-MRI offers the possibility to integrate myocardial perfusion and wall motion analysis in a single examination. In this regard, recent data suggest that the assessment of myocardial wall motion and perfusion during a single session may enhance the sensitivity of the technique for the diagnosis of CAD. However, to date limited data is available on the prognostic value of high-dose DS-MRI in large patient cohorts, treated according to current guidelines. Assessment of long-term outcome of DS-MRI is important because this test may identify both high-risk patients, who would benefit from invasive diagnostic and therapy, and lower-risk patients in whom additional procedures and intensive medical follow-up are not required. In the present study we aim to determine the value of wall motion and perfusion assessment during high-dose dobutamine/atropine MRI in predicting cardiac events. In addition, the incremental value of the MR-stress testing results was assessed (inducible wall motion, perfusion abnormalities and the combination of both) after the consideration of traditional clinical risk factors and baseline ejection fraction.

The purpose of the study is to evaluate diagnostic performance of high iodine (iopamidol 370 mg/dl) content versus low iodine (iodixanol 300 mg/dl) content for diagnostic accuracy by contrast-enhanced Coronary Cardiac Computed Tomography (CCTA) using a 64-detector-row CT scanner for detection of presence or absence of coronary artery obstruction when compared against invasive coronary angiography, the standard of truth.

Elevation of plasma homocysteine has been recognized as one of the risk factors of atherosclerotic disease. The objectives of this study are: (1) to investigate the level of plasma homocysteine and the prevalence of hypehomocysteinemia (2) to find out the role of homocysteine in coronary artery disease and the proper cut-off point of plasma homocysteine to evaluate the presence of coronary artery disease; (3) to understand the control condition of tranditional risk factors of cardiovascular disease, especially hypertension, dyslipidemia, and diabetes mellitus. The study subjects were recruited from the ambulatory setting of cardiology in National Taiwan University Hospital.

Comparison study of myocardial perfusion SPECT imaging with current clinical use camera and new camera.

The goal of this observational study is to study the non obstructive type of ischemic heart disease by identifying unique clinical features , frequency and age group .in patient admitted in coronary care unit , suffered from angina or heart attack. . The main question[s] it aims to answer are: how it different from classical type of ischemic heart disease ( obstructive coronary artery disease) what is frequency and age prevalence of these patient Participants evaluated by history , clinical examination, serum troponin and coronary angiography.

It is well documented in the literature that myocardial revascularization during valve surgery increases the risk of early mortality and morbidity. According to the most recent version of the European Guidelines, the possibility of myocardial revascularization via coronary artery bypass should be evaluated in patients with an indication for surgical treatment of heart valve disease but with coronary artery stenosis ≥ 50-70%. In this study, patients hospitalized for surgical heart valve disease, with occasional pre-operative finding of ≥ 50-70% coronary artery stenosis, without angina, are examined. After interdisciplinary discussion in the Heart Team, it was decided not to treat coronary artery disease during valve surgery. The aim is to evaluate the short and medium-term results of this "conscious omission".

The aim of the present observational study is to collect clinical data on the medical device non-implantable medical device Fluydo NC: coronary angioplasty non-compliant balloon dilatation catheter in the daily use in a not selected population.