Active clinical trials for "Coronary Stenosis"

The aim of this study is to compare vessel healing at 9 months using OCT imaging for two different treatment techniques for treating bifurcation lesions. Quantitative assessment of OCT images will be used to assess re-endothelialization and quality of strut apposition to the vessel wall.

The idea behind the Teledi@log consortium is to develop tele-rehabilitation concepts and technologies so that all types of heart disease patients, regardless of degree of severity, can be offered individual, customized and coordinated tele-rehabilitation across sectors. The project is innovative, breaking new ground in relation to existing national and international research projects in the area. The Teledi@log consortium sees its major task as developing and testing scenarios which can lead to a more coherent rehabilitation for heart patients in areas such as patient training, organization across the boundaries of the health system and using tele-rehabilitation technology. The Teledi@log consortium seeks to develop new tele-rehabilitation concepts which bring the patient closer to the health system and thereby promote the heart patient's rehabilitation, giving the patient and their families a more active role via new tele-rehabilitation technologies.The hypothesis of the study is that heart patients participating in a telerehabilitation program will have a higher quality of life compared to heart patients following traditional rehabilitation activities.

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.

Statement of Problem According to the National Fire Protection Association (NFPA), 43.7% of all firefighters that died on the job experienced sudden cardiac death. The job also affords an incredible amount of stress. Cholesterol therapy has been well demonstrated to reduce coronary plaque progression. However is certainly not the only factor in evaluating for progression of coronary artery disease (CAD), and other factors must play a role. Garlic therapy has been shown to retard atherosclerosis independently. Hypothesis and Specific Aims The hypothesis of this proposal is: In comparison to the placebo group, Aged Garlic Extract (AGE) therapy + Coenzyme Q10 (CoQ10) will be effective in slowing progression of coronary artery calcification (CAC) in firefighters with established atherosclerosis, independent of baseline blood pressure, statin use or other cardiovascular risk factors. Specific Aims: Compare the effects of cholesterol lowering effects in a firefighter population of patients under the influence of Aged Garlic Extract + CoQ10 or placebo. Compare whether degree of change in atherosclerotic coronary artery plaque burden will change at a different rate under the influence of Aged Garlic Extract + CoQ10 compared to placebo treatment. Compare whether Aged Garlic Extract + CoQ10 therapy induces changes in baseline values including biological and biochemical parameters, such as LDL cholesterol, homocysteine, C-reactive protein (CRP), and endothelial function.

This study will evaluate the effectiveness of CorCTA by comparing the results of the test with another imaging method called Fractional Flow Reserve (FFR), which is done as a part of the cardiac catheterization.

An estimated 8% to 15% of patients hospitalized for a coronary pathology undergo coronary revascularization surgery with extracorporeal circulation (ECC). (1) Like most major cardiac surgical interventions, it is performed with the heart stopped; this leads to more or less severe myocardial ischemia. The heart is stopped (and therefore deprived of oxygen) for a duration that varies depending on the number of bypasses required, and on the local difficulties encountered. On average, myocardial ischemia lasts between 20 and 80 minutes. Heart protection during coronary revascularization surgery remains a crucial factor in limiting the heart's aerobic function during aortic clamping, and in minimizing the resulting post-operatory ventricular dysfunction. Its quality is a determining factor of the post-operatory issue. High-performance heart protection solutions such as Custodiol have been used by heart surgeons for a few years. They are used as an alternative choice to other cardioplegic solutions, the efficacy of which has already been proven (St Thomas). These two myocardial protection solutions have never been evaluated in an in vivo, randomized, comparative trial.

The present case-control study is designed to investigate the disease characteristics of IR-CAD by comparing the demographics, clinical features, lab results, imaging findings, and prior treatment between 20 patients with IR-CAD and 10 patients with AS-CAD.

The READY register is a multicenter open label registry of patients underwent invasive intracoronary FFR and RFR measurement using the Quantien system. The register collects clinical and epidemiological data of patients scheduled for invasive coronary physiology.

Coronary artery blockages can reduce blood flow to the heart muscle. Fractional flow reserve (iFR or FFR) assessment is an invasive tool used to determine how much blood flow is reduced. The investigators will perform iFR/FFR on all intermediate coronary stenoses using standard practice, immediately before (at the time of) transcatheter aortic valve replacement (TAVR) and after successful TAVR. The investigators will compare pre- and post-TAVR iFR/FFR values, and assess short-term outcomes. The investigators hypothesize that iFR/FFR values will be consistently and significantly higher pre-TAVR in comparison with post-TAVR for the same lesions.

This study will enroll patients who are referred for coronary angiography and require physiological assessment to see if the lesion can be treated as per the local standard of care. Approximately 92 participants will be enrolled. There are no follow up visits required so participation in this study will end when subjects are discharged from the hospital.The study will be comparing the resting flow reserve against the instantaneous wave-free ratio (iFR) and fractional flow reserve. All these tests offer a way to image a legion and determine if it is suitable to be treated. FFR measures the pressure differences across (narrowed coronary arteries usually due to atherosclerosis), iFR's are performed during cardiac catheterisation (angiography) using invasive coronary pressure wires which are placed in the arteries of the heart that are to be assessed and the Resting flow reserve looks at the maximum increase in blood flow through the coronary arteries above the normal resting volume.