Active clinical trials for "Coronary Artery Disease"

The goal of this multicenter prospective clinical cohort study is to investigate the impact of early use of low-dose Ticagrelor-based dual antiplatelet agent therapy (TDAPT) (ticagrelor 120mg daily; l-TDAPT) as compared to standard-dose TDAPT (ticagrelor 180mg daily; s-TDAPT) in outcomes of percutaneous coronary intervention (PCI). The main question it aims to answer are: Given the low ischemic risk and high bleeding tendency in Asians, the low dose TDAPT may provide better net clinical benefits of ischemic and bleeding events than the standard dose TDAPT.

This cohort study will measure how severe is the coronary artery disease (CAD), at time of CAD diagnosis, clinically and angiographically in the different cohorts of newly diagnosed diabetes and prediabetes versus normal glycemia patients in the study center.

This study will evaluate the level of agreement between noninvasive CCTA-based quantification and characterization of coronary atherosclerosis and invasive IVUS .

This work suggests a methodology to adapt the injected radionuclide activity to the level of attenuation of each patient. The investigators propose a dose reduction adapted to the patient's weight, with no significant degradation of the image quality, in order to improve patients and staff radioprotection, standardize the image quality for easier clinical interpretation, and lead to radiopharmaceutical saving in the context of myocardial perfusion Imaging.

This study is a prospective, single-center clinical trial，Comparison of transthoracic echocardiography and coronary angiography in coronary heart disease using a paired-analysis clinical trial.This study is based on the basis of clinical screening for coronary heart disease.

Myocardial perfusion imaging is an efficient tool to assess the risk of major cardiac events for patients with known or suspected coronary artery disease. If the test is normal, or if the abnormalities of perfusion represent less than 10% of the left ventricle myocardium, the patient is considered at low risk and should be managed with optimal medical treatment only. Recently, new gamma cameras using semi-conductor detectors have been developed. Their diagnostic performances have been demonstrated and confronted with various anatomical and functional reference techniques, such as coronary angiography and FFR. The prognostic value of a normal SPECT MPI has not been specifically assessed yet. Coronary microvascular dysfunction (CMVD) has been demonstrated to be an early marker of coronary artery disease (CAD). Preliminary data suggest that myocardial perfusion heterogeneity (a potential surrogate marker of endothelial dysfunction) can be assessed on conventional MP-SPECT, but its additive and independent prognostic value over the presence of myocardial ischemia remain unknown. Accordingly, the purpose of this study is : To assess the prognostic value of a normal myocardial perfusion stress imaging using a semiconductor gamma camera with a dual isotope high speed protocol, To evaluate the prognostic value of myocardial perfusion heterogeneity assessed by a new automatized image processing method, in normal SPECT MPIs. The main hypothesis is that the presence of myocardial perfusion heterogeneity is predictive of cardiovascular events in patients referred to the Nuclear Cardiology Department for routine evaluation of known or suspected CAD.

Background: Only around 20% of all patients seen in hospital with suspected Acute Coronary Syndrome will have Acute Myocardial Infarction. However, several studies indicate that patients where ACS had been excluded by conventional methods sustain a higher cardiac morbidity and mortality than the background population. Not all of these patients can be identified by traditional risk factors such as cholesterol, hypertension, and diabetes or with conventional methods such as ECG, troponin and clinical symptoms. Non-Contrast Cardiac-CT measures the amount of calcification in the coronary arteries and might be a useful addition in predicting future cardiac events in this patient group. The aim of this study is through a double-blinded study to determine whether non-contrast CT scan with calcium score can be used to identify patients at increased risk of death and cardiac event within the following 12 months after an acute admission where troponin measurements were normal. Methods: The study will investigate patients with suspected Acute Coronary syndrome who have been examined and subsequently sent home from an emergency- or cardiology department without ACS or another obvious explanation. 750 patients, age 30-70 years who are included in the study: "Identification of risk factors in non-cardiac chest pain patients" will be offered a non-contrast CT scan with calcium score within 14 days after the hospital contact. The participants will be included in a 12 months follow up, where the result of the calcium score is not revealed neither for the patient nor the investigator. After 12 months the results of the scan is compared with the rate of cardiac events. This project is a multicenter study and recruits patients from 6 emergency - and cardiology departments in the region of Southern Denmark. The study commences at September 2014 and results of this project are expected to contribute to the risk stratification of Non-cardiac chest pain patients.

Examination of probable distinction between cardiac or non- cardiac thoracal disorder via echocardiographic myocardial strain analysis

The investigators are going to recruit patients who have a scheduled elective coronary angiography and going to do a dobutamin stress echography (DSE) before the coronary examination. Next to a regular 2D-DSE, the investigators will perform an 3-dimensional DSE, incl ventriculography. In the interventional part (coronary angiography), they will measure each stenosis with fractional flow-reserve (FFR)and herewith graduate its stenosis severity.

In this study, the investigators hypothesized that significant proportion of patients with coronary artery disease (CAD) has reduced capacity of glucagon-like peptide-1 (GLP-1) secretion, which is detectable as blunted response of plasma active GLP-1 level to oral glucose loading and that reduced GLP-1 secretory function is associated with increased severity of coronary artery stenosis but not with classic risk factors for CAD. To test this hypothesis, the investigators will analyze correlation between GLP-1 secretory capacity and severity of coronary artery stenosis determined by Gensini Score (GS), an established score system for coronary artery stenoses. Additionally, the investigators will analyze relationship between level of "total" GLP-1 and severity of coronary artery stenosis to determine how it is different from the active GLP-1 - coronary stenosis relationship.