View clinical trials related to Myocardial Ischemia.
Filter by:The objective of the study is to assess the superiority of the everolimus-eluting stent (Endeavor Resolute®) compared with the everolimus-eluting stent (XIENCE V®) regarding uncovered stent strut segments.
The purpose of this study is to evaluate the effect of intensive blood pressure control compared to standard blood pressure control on progression of coronary atherosclerosis by intravascular ultrasound in hypertensive patients with coronary artery disease.
Treatment of coronary artery disease is a major health care problem across the entire word, and the United States. Unfortunately, despite a number of medical advances, diagnostic procedure, or epidemiological studies, the treatment of these patients remain complex, and and at times frustrating. In fact, the COURAGE trial conducted in 50 centers across United States and Canada documented that drug treatment, coronary interventions or both were not effective solution in coronary artery diseases. A novel approach has recently been developed, based on the critical role of the potassium (K) content in red-blood-cell in myocardial oxygenation, since oxygen and K binding by hemoglobin (red-blood-cell) occurs simultaneously in blood passing through the lungs, whereas in the organs as the heart, the hemoglobin release both Oxygen and K ions. This apparently simple mechanisms occurs in human blood in all individuals but could be altered in subjects with acquired or hereditable defect in red-blood-cell K content, as in hypertensives or CAD patients.
The purpose of this study is to examine the effect of two different physical exercise protocols on changes in coronary artery plaque composition and development of in-stent restenosis in patients treated with percutaneous coronary intervention with stent implantation. The investigators will compare aerobic interval training and moderate continuous training. Both exercise protocols have a duration of 12 weeks. The investigators hypothesize that aerobic interval training is superior to moderate continuous training regarding effects on the composition of coronary artery plaques and a reduction in the development of in-stent restenosis.
A single blind, multi-center, randomized study is preformed to compare NOYA CoCr biodegradable coating sirolimus-eluting stents with Firebird2 drug-eluting stents from MicroPort Medical (Shanghai) Co., Ltd. to evaluate the safety and efficacy of NOYA CoCr biodegradable coating sirolimus-eluting stents in treating coronary artery lesions.
Cardiac rehabilitation, including physical training, has become accepted treatment following myocardial infarction, coronary stent implantation and coronary bypass operation. Besides modifying patients' risk profile for future coronary problems, the focus is on improving exercise capacity. The ability to be able to perform at a higher maximal level is a strong predictor for outcome (new cardiovascular events and mortality). The main purpose of this study is to evaluate whether aerobic interval training outweighs more classical moderate endurance training in improving exercise capacity. During interval training, patients perform exercise at high intensity, but for only a couple of minutes and then recover at a lower intensity. Such intervals are repeated. Preliminary evidence from smaller studies suggests that this type of training leads to a larger increase in exercise capacity, compared to the more traditional endurance training at moderate intensity. In addition, mechanisms that might explain how this improvement is achieved, as well as safety and impact on quality of life will be studied.
This study enrolled participants with documented exercise-induced myocardial ischemia in order to evaluate whether ranolazine, when taken prior to exercise, can improve blood flow to the heart (myocardial perfusion), as assessed by exercise-induced myocardial perfusion defect size (PDS) and total perfusion deficit (TPD), using gated single photon emission computed tomography (SPECT) myocardial perfusion imaging (MPI). This was a 2-period crossover study. The last dose of each period must have been taken 3-4 hours prior to conduct of the exercise SPECT MPI. After the research exercise SPECT MPI was performed at the end of Period 1, participants discontinued the treatment they were randomized to for that period and began the other treatment in Period 2.
Patients who receive drug-coated stents (as opposed to the less frequently used bare metal stents) are currently recommended aspirin plus a thienopyridine such as Plavix, Effient, or Ticlid for one year. These guidelines apply to all patients with drug-coated stents, regardless of the type of stent they received. The purpose of these medications is to prevent a clot at the stent site when there is poor healing of artery tissues over the stent. A clot is a serious concern because it can suddenly block blood flow to the heart and cause a heart attack. These medications have been proven to be helpful in stent patients, but they do have risks. The common side-effects are related to bleeding which in a few patients can be serious. A patient may be at risk for forming a clot if they must put these medications on hold for a surgical procedure to reduce the risk of bleeding. Plavix and Effient are also expensive for patients who are underinsured or uninsured. There is interest is finding a way to show that a patient's stent has healed properly before 12 months and that they can safely stop these medications early. This study is looking at a way to determine if patients who receive the Endeavor drug-coated stent and who are prescribed aspirin and Plavix can safely stop Plavix at 3 months instead of 12. Previous studies have shown 99.9% coverage of the body's own tissues on an Endeavor stent after 3 months. A device called an Optical Coherence Tomography (OCT) catheter will be used in this study to look at how much a stent has healed. It allows imaging inside a heart artery and the ability to see the healing of tissues over the stent.
CORAMI trial is a prospective, international, multicenter randomized study which will be performed in experienced invasive facility centres with 24/7 PCI (percutaneous coronary intervention) duty and patient enrollment will continue for 18 months (October 2010 - March 2012).The aim of the study is to compare strategy of complete vs target lesion-only primary PCI in IRA (infarct related artery) in STEMI (ST elevation myocardial infarction) patients.
The investigators will evaluate the effect of metformin therapy during 4 months in non-diabetic patients following ST-elevation myocardial infarction on left ventricular ejection fraction as measured with cardiac magnetic resonance imaging, compared to placebo.