Active clinical trials for "Atherosclerosis"

Endarterectomy of the carotid artery procedure will be performed at Sheba Medical center vascular surgery department, followed by fixation and histology. Tissues will then be transferred to Weizmann Institute of Science for observation implementing advanced electron microscopy techniques. Finally, joint evaluation of the results will be carried out, in relation to the patient clinical history.

Based on the large population of patients, in-stent restenosis (ISR) is still an important problem in the field of cardiovascular disease. How to reduce the incidence of ISR and the treatment of ISR has become the focus and hot spot. The 2018 ESC Guidelines for Cardiovascular Intervention recommends treatment of ISR under the guidance of intravascular ultrasound (IVUS), or optical coherent tomography (OCT). Circulation published a new Waksman ISR classification based on mechanisms and components of the restenosis tissue, which provides guidance for treatment strategy. Because of its good resolution, OCT makes it more accurate to distinguish the components of vascular tissue, thus providing a decision-making basis for interventional therapy. OCT examination can obtain the characteristics of the ISR more precisely. Neoatherosclerosis (NA), is one of the ISR types and accounts for more stent failure and target lesion failure than other types. Identification NA is important for decision-making of interventional therapy. However, the acquisition and analysis of OCT images not only need the digital angiography machine (DSA) equipped with the majority of hospitals, but also need professional OCT imaging equipment and technicians. Patients with severely CKD cannot bear OCT examination because of the large amount of contrast agent. OCT catheter is more than ten times the price of the CAG catheter. Therefore, identification of NA by the use of artificial intelligence (AI) is of significance to set therapeutic strategy for ISR patients, especially in patients with CKD. Our study retrospectively analyzed CAG images and OCT images of ISR patients obtained from Jan 1st,2015 to Oct 31st,2020. Identify NA by analyzing OCT images, build up U-net and V-net to analyze the CAG and OCT images, and finally build up an identification system of NA based on CAG images by AI. This study has been approved by Ethics Committee of Chinese PLA General Hospital (S2018-033-01)

Continuous Doppler ankle brachial index (ABI) is the gold standard for screening and monitoring of peripheral arterial disease (PAD) but is no longer carried out in clinical practice. The recommended measurement was gradually replaced by colour or pulsed Doppler without validation of these techniques. The objective of our study is to compare these two techniques (color Doppler and pulsed Doppler in echodoppler) with respect to the gold standard (continuous Doppler) for ABI measurement.

Cardiovascular disease is a leading cause for morbidity and mortality in general population. The incidence of cardiovascular disease and their poor outcome is well documented in a broad spectrum of connective tissue diseases, especially in rheumatoid arthritis (RA). The risk of incident CVD is increased by 48% in patients with RA compared to the general population. RA is associated with 50% increase in the mortality in patients with cardiovascular disease (CVD). One reason is the more frequent cardiovascular risk factors in RA patients compared with the general population. Patients with RA have a high risk of premature cardiovascular disease (CVD). The aim of the present study is to assess whether there are non-invasive measures that might predict arteriosclerosis in RA patients.

This is a prospective and observational study in patients with type two diabetes. The study hypothesis is that chronic hyperglycemia causes an increase in the microcirculation on the carotid artery wall and retina, evaluated by angio-OCT. Furthermore, the reestablishment of normoglycemia would decrease this microcirculation, which could trigger hypoxic and ischemic changes, accelerating preclinical atherosclerosis. The study goal is to describe the microangiopathy in both territories in patients with type two diabetes and chronic hyperglycemia, and to evaluate changes after the reestablishment of normoglycemia.

Investigator-initiated, international, multicentre, observational study with two cohorts. The two study cohorts will be: Cohort A: to understand if the local blood flow patterns (associated with low WSS), as evaluated by computational fluid dynamic tools from combined angiographic and OCT invasive images, may better predict the clinical outcome of patients with bifurcated coronary lesions treated by PCI. Cohort B: to understand if the local blood flow patterns (associated with low WSS), as evaluated by computational fluid dynamic tools from combined angiographic and OCT invasive images, may better predict the clinical outcome of patients with sub-critical bifurcated lesions managed conservatively. Coronary angiography and OCT images will be combined to obtain a three-dimensional model of the diseased coronary vessels that will be used to calculate the local blood flow patterns and the time-averaged WSS at the bifurcated lesion level by using computational fluid dynamics software. Baseline (in patients both managed conservatively and treated by PCI) and post-PCI (in patients treated by PCI) images will be processed.

A prospective study of 700 patients with coronary artery disease will undergo non invasive evaluation of their carotid arteries by ultrasound and microwave radiometry. The patients will be followed up for 3 years and their outcome regarding the cardiovascular events (death, cardiac events, cerebrovascular events) will be recorded

The purpose of this study is to determine whether non-invasive atherosclerotic measurements (baPWV, IMT, FMD, CACS, ABI) are valuable predictors for cardiovascular events in elderly. At inception, routine physical examination and non-invasive atherosclerotic measurements will conducted on all participants. Then they will be followed prospectively for at least 2 years. All cardiovascular and other health events will be recorded.

Arteriosclerosis is a common chronic disease with well known risk factors like diabetes mellitus, hypertension, dyslipidemia, adipositas and smoking, leading to severe complications like myocardial infarction, stroke or peripheral arterial occlusive disease. In addition to life-style factors there is also a genetic predisposition to develop complicated atherosclerosis. Objective: Improve individual risk prediction by clinical phenotyping and genotyping.

The purpose of this study is to determine whether chemotherapy induces regression in atherosclerotic plaques in oncologic patients already undergoing PET FDG as part of their routine assessment.We will use PET FDG to assess whether the inflammation in atherosclerotic plaques is affected by chemotherapy and anti angiogenic therapy.