Active clinical trials for "Coronary Occlusion"

ACROSS-Cypher® is a prospective, multi-center, open label, single arm study of the Cypher® sirolimus eluting coronary stent in native total coronary occlusion revascularization. The primary endpoint is binary angiographic restenosis at 6 months. The TOSCA-1 trial will be used as the historical control. The hypothesis is that compared with TOSCA-1 patients who were treated with the heparin-coated Palmaz Schatz stent, treatment with the Cypher® sirolimus eluting coronary stent will result in a >50% relative reduction in 6 month restenosis within the treated segment of the target vessel.

This phase I clinical trial will evaluate the safety and efficacy of intra-coronary injection of AC133 selected autologous marrow-derived stem cells in patients with chronic coronary artery occlusion. A clinical study to determine the therapeutic potential of marrow-derived stem cells as an adjunct therapy to current standard therapies for CAD is warranted. The current initiative is to investigate a model of chronic myocardial ischemia and (1) to determine whether intra-coronary injection of selected autologous marrow-derived AC133 stem cells is reasonably safe for use in humans and (2) if this treatment shows any improvement in coronary perfusion, as assessed using non-invasive imaging. This study is structured to evaluate the feasibility and safety of autologous AC133+ bone marrow-derived stem cell via intra-coronary injection into documented ischemic but viable myocardial zones via established collateral vessels. The epicardial vessel that normally supplies the ischemic zone must be 100% chronically occluded and considered non-revascularizable by percutaneous means.

Wire-crossing of a chronic total coronary occlusion (CTO) is time-consuming and limited by the amount of contrast agent and time of radiation exposure. Magnetic wire navigation might accelerate wire-crossing by maintaining a coaxial vessel orientation. This study compares magnetic with conventional wire navigation for recanalization of CTOs.

Chronically total occlusions (CTO) are difficult to treat and have high risk for restenosis. Although everolimus-eluting stents (EES) [(Xience, Abbott Vascular) or Promus (Boston Scientific)] are very promising for the treatment of CTOs due to their low late loss and excellent deliverability, there are currently no published data on EES implantation in CTOs. The specific aim of this proposal is to examine the 8-month incidence of binary angiographic in-stent restenosis (defined as a stenosis of > 50% of the minimum lumen diameter of the target stent) after implantation of the EES in CTO. It is the investigators hypothesis that EES-treated CTO lesions will have ≤ 20% 8-month in-stent binary angiographic restenosis rate.

Pecutaneous coronary intervention (PCI) of chronic total occlusions (CTOs) is most commonly performed using bilateral transfemoral access and 8 French guiding catheters. However, transfemoral approach (TFA) is associated with higher risk of vascular access complications.5 It has been reported that using transradial approach (TRA) reduces vascular complications and may be associated with a better clinical outcome. Transradial access is also used in complex PCI interventions.There is a growing body of evidence regarding the use of this approach also in CTO procedures. In available literature, all studies comparing TRA vs. TFA in CTO consisted of single center and single operator experience. Besides, none of them is randomized. To fill in the gap, we sought to examine the technique and outcomes of transradial vs. transfemoral CTO PCI in a contemporary multicenter randomized study.

A coronary chronic total occlusion refers to the long term complete blockage of a blood vessel supplying the heart. Exercise is beneficial for patients with heart problems, including people with narrowed blood vessels. However, exercise has not previously been tested in patients with a completely blocked blood vessel. Therefore, the aim of this study is to evaluate exercise testing in participants with a coronary chronic total occlusion, and to see if the physiological changes that occur are reproducible when participants are re-tested. Secondly, the study will see if sustained exercise is safe in this population. Participants will make 3 visits to our Laboratory. During the first two visits participants will complete symptom limited exercise tests using a stationary bike for approximately 8-12 minutes. The bikes' resistance will gradually increase until participants choose to stop or the researcher ends the test. Participants will wear a mask that collects exhaled breath for testing, and will be connected to an electrocardiogram (heart trace monitor), and blood pressure cuff for monitoring throughout the test. During visits one and three patients will also have blood taken pre and post exercise. Researchers will analyse how the amount of oxygen consumed with increasing exercise relates to the participants' heart rate. A plateau in these measures would indicate a change in the heart's blood supply resulting in reduced function. The participants' third visit will involve cycling under the same conditions as previous visits. However, during this test participants will be asked to cycle continuously for 20 minutes at a resistance set by the researchers. This level of resistance is determined from the results of the first test, as the point at which changes in blood flow and heart function occurred. In the last five minutes of the test patients will have an echocardiogram (heart scan), to look at the heart function.

This study will evaluate the profilatic effects of inspiratory muscle training (IMT) on functional capacity, respiratory muscle strength, postoperative pulmonary complications and days of hospitalization (PPC) in patients submitted to coronary artery bypass graft surgery (CABG).

Patient delay in seeking medical attendance for symptoms of acute ST elevation myocardial infarction (STEMI) is the major obstacle to reduce the current mortality from acute coronary syndromes. The Mini RELF device is a hand held self applicable device intended to detect on an individual basis an elevation of the ST segment that is indicative for an acute coronary occlusion. The investigators aim to evaluate the accuracy of Mini RELF device when it is self-applied on a daily basis by patients with coronary artery disease.

In a prospective randomised study design to investigate, if a systematic risk factor screening for bleeding ulcer in patients, who following percutaneous coronary intervention (PCI) commence a one year combination treatment with low dose aspirin and clopidogrel, followed by prophylactic treatment with a proton pump inhibitor (PPI) in case of increased risk, can reduce the risk of bleeding ulcer. Based on the recently raised suspicion that PPI's, possibly except pantoprazole, reduce the effect of ADP-receptor inhibitors, pantoprazole has been chosen as prophylaxis in the screening group, and analyses will be done to ascertain whether PPI treatment increases the risk of coronary events. Further analyses will be made to see whether PPI prophylaxis in high risk patients can increase compliance with the antithrombotic treatment through a reduction of side effects, thereby reducing the risk of myocardial infarction in particular stent thrombosis. The study population will be analyzed further to identify the patients, who will benefit the most from PPI prophylaxis Hypothesis: screening heart patients for risk factors for bleeding ulcer and subsequently treating high risk patients with PPI can reduce the incidence of bleeding ulcer and increase compliance with the antithrombotic treatment; thereby possibly reducing the risk of coronary events and improving survival. Initial a description of the prevalence of risk factors will be done.

A prospective, randomized multicenter study of subjects with a high-risk of having a myocardial infarction (MI) due to acute coronary syndrome or bypass surgery. There is no differential intervention administered to the two arms of the ALERTS Study. The study evaluates whether or not a patient alarm from the Guardian System will provide benefit (e.g. shorten pre-hospital delay) compared to symptoms-only ER presentation in the event of a heart attack. An amendment to the data analysis protocol was collaboratively created by AngelMed and FDA, and was adopted by AngelMed on 4/22/2017.