Clinical Research Directory

The Role Oral Microbiome in the Development and Progression of Aorta Aneurysm and Carotid Atherosclerosis

The goal of this observational study is to compare the microbiome (bacterial al community) of the diseased vascular site and the oral cavity with specific attention to chronic inflammatory periodontitis in patients who have aorta aneurysm or carotid stenosis needing surgical treatment. The main question it aims to answer is whether pathogen members of the oral microbial community, that cause periodontal disease, are also present in the diseased vascular site proving its translocation from the oral cavity to the vascular system. We hypothesize that bacteria causing chronic periodontal disease can be found at the diseased vascular site highlighting the importance of maintaining and restoring oral health as preventive measure for vascular diseases. Participants will be asked to take part in a dental screening before vascular surgery, during which few samples will be taken non-invasively for analysis.

The Synergistic Effects of Menopause and HIV on Cardiovascular Disease Risk in Women

Menopause is associated with the acceleration of many comorbidities, including cardiovascular disease. Whether HIV and menopause together increase cardiovascular disease risk is a key knowledge gap. The goal of this observational study is to address this knowledge gap by looking at the role of menopause on cardiovascular disease risk factors such as insulin resistance, hypertension, hyperlipidemia, and carotid atherosclerosis using previously collected data. The investigators will look at underlying causes for cardiovascular diseases worsening in menopausal women with HIV by looking at the role of increased inflammation in the body and whether this is altered by weight. The investigators achieve this by enrolling participants who are willing to undergo a whole body MRI.

Comparison of Cerebral Oximetry and Neurological Status Testing in the Awake Patient in the Detection of Cerebral Ischemia During Carotid Endarterectomy

This randomized controlled study compares two methods of intraoperative cerebral ischemia monitoring during carotid endarterectomy performed under regional anesthesia: neurological testing in the awake patient and near-infrared spectroscopy (NIRS). The study aims to determine whether NIRS is equivalent to awake neurological testing in detecting cerebral ischemia during carotid artery clamping and in guiding the use of an intraluminal shunt.

[18F]AlF-NOTA-octreotide PET/MRI in Carotid Artery Disease

This clinical trial aims to evaluate whether \[¹⁸F\]AlF-OC PET/MRI can characterize and quantify inflammation in carotid atherosclerotic plaques. The study will assess if tracer uptake in culprit and non-culprit carotid arteries, measured by standardized uptake values (SUV), is associated with future cerebrovascular events. Specifically, it will examine whether \[¹⁸F\]AlF-OC uptake predicts the risk of recurrent ipsilateral TIA, amaurosis fugax, stroke, or other vascular complications. Participants will undergo \[¹⁸F\]AlF-OC PET/MRI and will be followed via telephone interviews at 90 days, 1 year, and 3 years after their initial stroke or TIA.

Residual Stenosis and Restenosis Following Carotid Endarterectomy With Primary Closure, A Prospective Tracking Study

This prospective, multicenter observational study aims to evaluate the incidence, timing, and characteristics of residual and recurrent (restenosis) carotid artery stenosis following carotid endarterectomy (CEA) with primary closure. Conducted across several neurosurgical centers in the Czech Republic, the study will include patients undergoing elective CEA who meet standard clinical indications. Participants will undergo preoperative CT angiography and follow-up imaging at 30 days and 1 year post-surgery. Residual stenosis is defined as ≥50% luminal narrowing detected within 30 days postoperatively, while restenosis is evaluated at later time points. The study will also assess clinical outcomes such as ischemic stroke, TIA, myocardial infarction, and mortality. The standardized surgical technique and harmonized diagnostic algorithm across all centers aim to provide robust data on the performance and durability of primary closure CEA.