View clinical trials related to Myocardial Ischemia.
Filter by:The current study is designed to test the hypothesis that compared to conventional treatment; endothelial function-guided treatment reduces adverse cardiovascular events in patients with non-obstructive coronary artery disease documented at clinically indicated coronary angiography.
This is a multi-center, investigator initiated study that will prospectively examine treatment strategies and outcomes of patients who underwent clinically-indicated Near Infrared Spectroscopy (NIRS). The information collected will be used to determine the frequency of NIRS imaging performed at the participating sites and to examine the clinical outcomes of the NIRS-detected Lipid Core Plaques (LCPs).
This retrospective study will investigate clinician behavior in diagnosing patients with possible obstructive coronary artery disease who received a Corus CAD (Age/Sex/Gene Expression score - ASGES) result compared to patients who did not have the test performed (matched control patients).
Encouraged by the recent data published ,the investigators think that a waiting time of 10 minutes is feasible while preserving diagnostic accuracy and would like to assess the feasibility and diagnostic efficacy of W10 compared with W30 imaging in a pilot study. By combining W10 imaging with half-time acquisition, the time of the technetium-99m myocardial perfusion imaging procedure could be shortened by at least 50%, lasting only 40 minutes for W10 (10-minute waiting) imaging compared with 90 minutes for W30 imaging (30-minute waiting). The investigators hypothesize that (1) W10 MPI is clinically feasible and tolerable by the patients, that (2) W10 MPI provides high image quality and that (3) W10 MPI provides diagnostic accuracy comparable to W30 MPI.
Intervention for coronary bifurcation lesion is about 10~20% of entire percutaneous coronary intervention (PCI). Bifurcation lesion is difficult to be treated and prognosis of PCI at bifurcation lesion has been poorer compared to that at non-bifurcation lesion. Furthermore, occlusion of side branch frequently occurred during PCI. Several techniques to prevent occlusion of side branch have been developed, but outcomes are not to be satisfied. H-side branch stent is developed to treat coronary side branch lesion and composed of proximal, connecting and distal parts. In vivo study performed in pigs showed effective H-side branch stent. This study is to confirm safety and efficacy of H-side branch stent for treatment of coronary side branch lesion.
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.
Subjects presenting with probable acute coronary syndromes scheduled for cardiac catheterization will be enrolled in this study. Consented subjects will be randomized to receive ticagrelor started with a loading dose immediately after enrollment versus receiving a loading dose of ticagrelor during cardiac catheterization after diagnostic angiography but prior to stenting. Optical coherence tomography (OCT) will be performed after stenting and the volume of thrombus within the new stent will be measured and compared between the groups.
The purpose of the study is to determine which priming fluid is the safest for use for priming the heart-lung machine used during cardiopulmonary bypass for patients undergoing cardiac surgery. The fluids to be compared are albumin and voluven. A control group will receive only crystalloid.
Rubidium myocardial perfusion PET is an imaging test used to diagnose patients with abnormal blood flow to the heart secondary to narrowing of the heart vessels. Phase analysis is a computer method that is applied after the PET test is done. It is used to determine when a region of the heart contracts relative to other heart regions in the heart beating cycle. Initial data suggest that regions of the heart with abnormal blood flow change the pattern of contraction from rest to stress conditions. That is, regions of the heart with abnormal blood supply become dyssynchronous when compared to the normal regions of the heart. This study will investigate whether phase analysis may aid the visual interpretation of rubidium myocardial perfusion PET studies by determining the areas of the heart that are not beating in synchrony with the normal heart regions. This information will be used as a proxy for poor blood supply. The gold standard will be coronary angiography by which the percent narrowing of the heart vessels is assessed.
Subjects with acute coronary syndromes scheduled for cardiac catheterization will be enrolled in this study. Subjects that are to be treated clinically with coronary artery stenting will be randomized to receive a loading dose of clopidogrel versus ticagrelor after diagnostic angiography but prior to stenting. Optical coherence tomography (OCT) will be performed after stenting and the presence of blood clots inside the new stent will be measured and compared between the groups.