Active clinical trials for "Peripheral Arterial Disease"

Serum uric acid level is a commonly measured biomarker. The association between serum uric acid level and the risk of developing cardiovascular diseases has been observed in some studies, while others showed controversial results. Estimation of this association may help to predict cardiovascular outcomes and may guide new treatment strategies. The hypothesis is that increased serum uric acid level is associated with a range of cardiovascular diseases.

This is a proof-of-concept study to collect images to train a CADe algorithm to predict the correct level of amputation in individuals scheduled for amputation secondary to PAD.

Observational Study that evaluates the interest of Doppler waveforms classification in Peripheral Artery disease

VascuQol (VQ) is a specific questionnaire to assess the quality of life of patients with critical limb ischemia which is also used as an index in vascular registries. The original version has 25 items (VQ-25), divided into 5 subscales or domains: pain, symptoms, activity, social and emotional. The shortened version, VascuQol-6 (VQ-6) is made up of 6 questions and 4 possible answers, which score from 1 (worst quality of life perceived by the patient) to 4 (best quality of life perceived by the patient). The total score is between 6 and 24, and a higher value is related to better health. While the VQ-25 questionnaire has been translated and validated in 21 languages, the shortened version VQ-6 has been translated and validated in some languages, not including Spanish. As it is a fast and easy-to-use tool iwhich has demonstrated statistical validation to measure PAD in other versions of the same questionnaire (other languages), a cross-cultural adaptation and statistical validation of the questionnaire from English to Spanish will be carried out.

Tissue perfusion assessment is key to more accurate measurement of foot ischemia, which is in turn an important factor in appropriate treatment decisions. In practice though, tissue perfusion measurements are not routinely undertaken as few practical solutions exist that are easy to use and fit in everyday clinical practice. Pedra has developed a novel, easy to use, non-invasive device that can be used in practice to better inform treatment decisions.

Peripheral artery disease (PAD) is highly prevalent. It occurs most often in the lower extremities. Symptoms include intermittent claudication, ischemic pain, ulceration and necrosis. Amputation may be necessary in severe cases. PAD is also an indicator of future cerebrovascular and cardiovascular events. Diabetes mellitus (DM) is one of the major risk factors of PAD. Approximately 5% to 10% of diabetic patients have had foot ulceration, and 1% have undergone amputation. Other risk factors include smoking, old age, male gender, hypertension, dyslipidemia, hyperhomocysteinemia and renal insufficiency. Ankle-brachial index (ABI) is the most popular tool used to screen PAD. Doppler-derived ankle and brachial systolic pressure is obtained. If the ratio is abnormal, further confirmation studies will necessary. Although ABI is recommended as one of the screening tests for diabetic complications in guidelines, its utility is limited in calcified non-compressible vessels, which are common in DM and renal failure patients. Digital infrared thermal imaging (DITI) is used to detect surface temperature because objects of absolute temperatures higher than zero would radiate electromagnetic waves of certain wave lengths according to Plank's law. DITI examination is non-invasive, non-contact and fast. Theoretically, temperature of the perfusion area of the occlusive arteries will decrease. Investigators will analyze DITI of PAD, and observe the relationship between DITI, ABI and vascular duplex examination. The dynamic change of DITI before and after percutaneous transluminal angioplasty of PAD will also be observed. Investigators would like to evaluate the possibility of the clinical application of DITI for PAD screening.

After having had a first cardiovascular event, there is a considerable risk of developing a subsequent event. Only recently, a risk prediction model was developed for this group of patients. Imaging techniques such as the coronary artery calcium score and contrast-enhanced computed tomography (CT) of the coronary and carotid arteries could be able to add improve this model. Imaging may further improve the prediction of future manifestations of arterial disease and personalize disease monitoring and treatment.

The Cardiovascular disease research using Linked Bespoke studies and Electronic Records (CALIBER) e-health database was the data resource for this study. CALIBER links patient records from four different data sources: Clinical Practice Research Database (CPRD), MINAP (Myocardial Ischaemia National Audit Project registry) Hospital Episodes Statistics (HES), the Office for National Statistics (ONS).

Lipid-rich atherosclerotic plaques, or "vulnerable plaques" are prone to rupture, causing local intravascular thrombosis, with subsequent grave clinical consequences. Atherosclerotic plaques normally removed during surgery, and peripheral blood samples will be studied to achieve the following objectives: "1" Define histological features of the vulnerable plaque, analyze its physical characteristics, and investigate selected gene expression. "2" Study biomarkers of inflammation in conjunction with the presence of vulnerable plaques. "3" Explore the potential role of infection in atherogenesis.

The investigators want to evaluate the burden of peripheral artery occlusion disease in Taiwan peritoneal dialysis (PD) patients by using ankle-brachial pressure index (ABI) and toe-brachial pressure index (TBI). Furthermore, the investigators hope to demonstrate the possible casual factors of peripheral artery occlusion disease (PAOD) in PD patients.