View clinical trials related to Coronary Artery Disease.
Filter by:The objective of our work to determine the mechanisms of myocardial infarction in women without obstructive coronary artery disease.
It is universally accepted that high-pressure balloon inflation is required to most effectively deploy a coronary balloon-expandable stent. However, there is not consensus nor are there any guidelines regarding the method of balloon inflation, particularly the duration of inflation. Underexpansion and strut malapposition after stent deployment are among the most powerful predictors for adverse vessel outcomes. High-pressure inflation for stent deployment is effective to optimally expand the stent, but unlike in vitro testing in air, there are poorly distensible plaque elements that may not instantaneously yield to the balloon pressure. However, these elements may ultimately yield to prolonged inflation. Most clinical interventional cardiologists inflate for a relatively short period (15-30 sec). The investigators have noted that when balloon pressure is maintained at a certain pressure level it tends to decrease over time, and may require 60-180 or more seconds to maintain pressure stability. This finding implies that plaque elements are yielding slowly over time to the increased pressure, thus increasing expansion, and suggests that a prolonged inflation until balloon pressure stabilizes is more effective than a rapid inflation/deflation sequence to fully expand and appose the stent to the vessel wall. At present there is no consensus on stent deployment strategy. It is our hypothesis that prolonged inflation is superior to the more commonly used strategy of rapid inflation/deflation. Optimal coherence tomography (OCT), a novel technology that measures near-infrared light reflections and translates them into a 2D image, has an axial resolution nearly 10-times that of intravascular ultrasound (IVUS). Thus it is possible to examine the extent of stent apposition and stent expansion using this modality. The current randomized trial tests the hypothesis that prolonged balloon inflation until a stable balloon pressure is maintained is more effective than a rapid inflation/deflation sequence when performed to the same balloon inflation pressure.
The study is being performed to determine whether probiotics (GoodBelly) improves blood vessel function.Probiotics similar to yogurt are living micro-organisms (beneficial to its host) the lives in the intestine. Patients who have coronary artery disease will be enrolled in this study. The research results will be used to determine if the type of bacteria present in the intestines play a role in the pathogenesis of cardiovascular disease. Patients with coronary artery disease will be enrolled for up to 12 weeks. Patients will take the probiotic for 6 weeks. Following the 6 week period there is a washout period of 4 weeks, and an optional antibiotic study called vancomycin. Patients will take the vancomycin for 10 days. Blood vessel function will be measured by ultrasound before and after the probiotic supplement and vancomycin antibiotic. Blood will also be taken before and after to evaluate for markers of inflammation.
Due to advances and increased practice of interventional therapy for coronary artery disease, the rate of high-risk patients with severe coronary disease and reduced left ventricular function among patients undergoing coronary artery bypass grafting surgery (CABG) is increasing. The perioperative mortality in these patients is ≥ 5%. The perioperative and operative management for these patients has to be optimized in order to reduce their perioperative morbidity and mortality. One of the central aspects is perioperative maintenance of hemodynamic stability. The use of prophylactic IABP is a partly established, but not sufficiently evidence-based measure to reduce ventricular afterload and improve coronary perfusion pre-, intra- and postoperatively. Yet, it is an invasive procedure with potential complications. The planned trial should give an explicit answer, whether preoperative prophylactic IABP decreases 30-day all-cause mortality (primary endpoint) and long-term mortality (3, 6, 12 months; secondary endpoints) compared to preoperative conservative treatment in high-risk patients undergoing CABG.
This is a pilot study in a patient population with suspected coronary artery disease (CAD) as defined by the presence of a prior abnormal nuclear (PET/SPECT) myocardial perfusion scan. In this study design, PET/SPECT will serve as the comparative standard for presence of myocardial ischemia. We intend to determine the accuracy of an improved magnetic resonance imaging (MRI) technique for detection of myocardial ischemia in subjects with suspected CAD. This is not a study to specifically evaluate the efficacy or safety of the drugs but rather the diagnostic performance of the improved cardiac MRI procedure.
The investigators hypothesize that the application of 30% xenon as an adjuvant to general anesthesia with a target-controlled infusion of propofol is superior to general anesthesia with propofol alone with respect to hemodynamic stability.
The purpose of this study is to determine whether garlic in adjunct to conventional medical treatment is effective in improving carotid intima media thickness (CIMT), Flow mediated dilation (FMD) and plasma lipid profile or c-reactive protein of coronary artery disease (CAD) patients.
The risk of restenosis in the treatment of coronary artery disease has significantly lessened thanks to the introduction of Drug eluting stent. Yet, debates on the efficacy and safety of stents in complex lesions or patients have been circulated. Recently, PCI in multiple lesions is universally performed with the development of effective stents in various kinds in the clinics. However, a randomized study is rare for multi-vessel coronary artery disease in real procedural environments. The primary purpose of this study is to evaluate the clinical progress of biolimus A9-eluting stent and zotarolimus-eluting stent in multi-vessel coronary artery disease.
Study of heterogeneity in associations between heart rate and the initial presentation of 12 cardiovascular diseases.
Natural course of intermediate coronary artery disease (CAD) is very important to predict the prognosis of the patient with such disease. Several studies have well demonstrated the beneficial effect of lipid-lowering therapy on the progression of CAD with the modification of lipid profiles. This effect can be also explained by intravascular ultrasound (IVUS) or optical coherence tomography. However, the effect of plaque modification on coronary physiology has been rarely evaluated. This research is to evaluate the change of intermediate or nonculprit coronary lesion on lipid-lowering therapy via IVUS(optional) and FFR.