View clinical trials related to Myocardial Ischemia.
Filter by:There is a pressing need to find effective strategies for the prevention of contrast induced nephropathy in patients with advanced renal dysfunction. The current study was designed to assess the efficacy of a new protocol for preventing contrast induced nephropathy in patients with advanced renal dysfunction undergoing coronary interventions
It is well-known that non-optimal stent implantation associated with under-expansion or incomplete strut apposition during percutaneous coronary intervention (PCI) leads to a higher incidence of restenosis and stent thrombosis. OCT-guided PCI with metallic stent has previously been shown to be safe and feasible, resulting in better clinical outcomes compared with angiography-only guided PCI. Everolimus-eluting bioabsorbable vascular scaffold (BVS; Abbott Vascular, Santa Clara, CA, USA) was made from a bioabsorbable polylactic acid backbone which is coated with a more rapidly absorbed polylactic acid layer that contains and controls the release of the antiproliferative drug, everolimus. BVS has a number of proposed advantages over current metallic stent technology. These include elimination of chronic sources of vessel irritation and inflammation, which can reduce the potential risk of late scaffold thrombosis after complete scaffold bioresorption. Although the current generation of the Absorb BVS have larger strut thickness of 150 μm compared with 80 μm of strut of Xience stent, the acute recoil of the polymeric device was similar to that of metallic stent. However, operators tented to use dilating devices less aggressively because of the concerns about limitation in elongation-at-break of polylactide. Previous studies reported 20-30% of under-expansion or malapposition with BVS, which would increase the risk of adverse events including late stent thrombosis. OCT-guidance may improve more optimized scaffold placement and also better outcomes. Therefore, investigators will compare OCT guidance and angiography-only guidance for PCI with BVS regarding incomplete scaffold apposition and neointimal scaffold coverage. Investigators are also going to compare these two strategies regarding clinical outcomes with verification of the cut-off value by OCT-acquired uncovered scaffold rate.
Stem cell therapy is an emerging treatment for cardiovascular disease but the best cell type and delivery method remain to be determined. Pre-clinical studies demonstrated improvement of cardiac function by Mesenchymal stem cells (MSC) therapy in particular by their paracrine and immunosuppressive properties. Investigators initiated the MESAMI program by the bicentric pilot phase and highlighted the safety and feasibility of intramyocardial injections of MSCs from bone marrow in patients with chronic ischemic cardiomyopathy and left ventricular dysfunction, guide by the NOGA-XP system. The MESAMI program continues with the phase 2, multicenter, double-blind, randomized, placebo-controlled trial.The aim of this phase 2 study is to demonstrate a functional improvement, measuring peak VO2, at 3 months between the cell therapy group and the placebo group.
Computed tomographic angiography (CTA) is an important prognostic tool with regard to the detection of coronary artery stenoses. Both iodine delivery rate (IDR; the amount of iodine delivered to the patient per second) and iodine concentration are decisive factors in the opacification of arterial vessels. There remains to be some debate in the literature about whether the use of high iodine concentration contrast media is beneficial compared to lower iodine concentrations. To date, there have not been any studies comparing intracoronary attenuation using concentrated contrast media lower than 300 mg I/ml at coronary CTA. For a reliable comparison of CM with different iodine concentrations, adapted injection protocols insuring an identical IDR (in g iodine per second) are mandatory. The investigators hypothesize that usage of lower iodine concentrations, while maintaining identical IDR and total iodine load, will result in comparable diagnostical intra-vascular attenuation in CTA.
This study compares the results of current standard coagulation measurement devices to the Quantra System, a new device, using small amount of extra blood obtained during routine blood draws in cardiac surgery patients.
Transradial approach (TRA) for cardiac catheterization and percutaneous coronary interventions (PCI) is increasingly being used worldwide. At the present is unknown the cocktail of agents necessary to minimize local access site complications. The investigators planned a prospective randomized clinical trial to test the superiority of verapamil vs. heparin in the reduction of access site related complications.
The purpose of this study is to conduct a prospective, multi-center, single arm, non-randomized evaluation of acute outcomes in Chinese subjects, including those eligible for percutaneous transluminal coronary angioplasty (PTCA) with a reference vessel diameter of 2.25 mm to 4.0 mm, with the Medtronic Resolute Integrity™ Zotarolimus-Eluting Coronary Stent System.
The purpose of this study is to examine the acute effect of exercise on vascular function in women with nonobstructive coronary artery disease.
The purpose of this study is to evaluate the effect of ivabradine on cardiovascular events in patients with coronary artery disease.
The purpose of this study is to compare sitagliptin and placebo for the prevention of high blood glucose during surgery.