Active clinical trials for "Coronary Artery Disease"

This study is evaluating the performance of modern CT coronar angiography with low radiation technique compared to conventional invasive coronar angiography. The patients recruited will already be accepted for invasive coronary angiography based on clinical presentation, ECG and biochemical parameters. An "all-comers" design to avoid selection bias and no additional B-blockers will be used prior to CT angiography. The hypothesis is that it is possible to rule out significant coronary artery disease with sensitivity > 95 % and negative predictive value > 95 % with very low radiation doses.

Computer tomography coronary angiogram (CTCA) has emerged as a noninvasive alternative to assessing coronary artery luminal disease. Although the use of noninvasive CTCA for the detection of coronary artery disease is on the rise, the current technology of the 64-row multidetector computer tomography (MDCT) is subjected to multiple patient artifacts that can affect image quality.To eliminate these patient related artifacts a more advanced 320-row MDCT was recently developed. The investigators therefore propose that the newly developed 320-MDCT can provide an accurate noninvasive assessment of the severity of coronary artery luminal stenosis as an alternative to an invasive coronary angiogram.

The investigators examined the feasibility of treatment planning using virtual coronary revascularization and fractional flow reserve (FFR) CT before the invasive procedures.

The purpose of the study is to optimize an already existing algorithm for diagnosing atherosclerosis of the coronary arteries (CAD, Coronary Artery Disease).

The purpose of this study is to assess the non-invasive, Peripheral Arterial Tonometry (PAT) testing as another way of predicting potential coronary artery blockages in the heart.

Comparison of Fractional Flow Reserve versus instant Wave-Free Ratio for assessment of coronary artery stenosis severity in routine practice To compare FFR to iFR in arbitrary consecutive patients referred for percutaneous coronary intervention (PCI). To investigate the influence of hyperemia on iFR. To test reproducibility of iFR and FFR.

A prospective Study, aiming to understand and analyse the key role of the novel High Sensitivity Troponin T (hsTnT) within a group of patients undergoing an uncomplicated coronary angiography without receiving any additional intervention. The peri-procedural elevation of the hsTnT indicates some other factors being responsible for the elevation of the hsTnT in absence of an acute coronary syndrome, such as physiological components or micro-injuries. A one year follow-up has been collected.

Most patients presenting to the emergency department with chest discomfort have a nonischemic ECG and biomarkers of myocardial necrosis within normal limits. These patients are routinely admitted to hospital because of diagnostic uncertainty for occult MI or ischaemia. Acute myocardial ischemia is associated with acute mycardial dysfunction We tested a non-invasive plethysmographic arterial pressure change index of myocardial performance (dP/dt) that could be added to the diagnostic triage of ischaemia in the ER avoiding unnecessary admissions.

The study seeks to determine the accuracy of using anatomic and physiologic information measurable by computed tomography features of stenosis, plaque, fractional flow reserve-CT and to compare this measure to stress testing for the detection of myocardial ischemia against the gold standard of cardiac catheterization with fractional flow reserve. The hypothesis of this proposal is that integrating anatomic plaque features with physiologic fractional flow reserve-CT will optimize identification of coronary lesions that are ischemia-causing by computed tomography .

This study is being done to compare the blood flow measurements obtained with the SPECT and PET imaging scans. Measurements such as myocardial blood flow (MBF) and myocardial flow reserve (MFR) are analyzed on PET scans. These measurements give the doctors more precise information in diagnosing heart problems. SPECT scans, with new camera technology and computer software, now have the potential to also give this additional information. The study is investigating how well the blood flow measurements from SPECT compared to PET.