Percutaneous Transluminal Angioplasty

The goal of this clinical trial is to document a beneficial effect of percutaneous transluminal renal angioplasty (PTRA) of atherosclerotic renal artery stenosis in high-risk patients selected according to the criteria used in the DAN-PTRA study. The main questions the trial aims to answer are if renal artery stenting compared with optimal medical treatment alone has beneficial effects on: * Blood pressure * Kidney function * Hospitalizations for heart failure

The aim of this study is to explore the ability of the non-invasive device ODI-Tech® to monitor changes in microvascular blood flow in patients with lower limb ischemia undergoing the procedure percutaneous transluminal angioplasty (PTA). Microvascular data from patients and healthy case matched controls at baseline will be compared.15 patients and 15 healthy case matched controls will be enrolled.

Percutaneous transluminal angioplasty (PTA) is a minimally invasive procedure for dilating blood vessels in the treatment of peripheral artery disease. The aim of this registry is to collect prospectively and systematically clinical research data from patients undergoing PTA. This registry is an open-end observational study to assess the characteristics and outcomes in patients with undergoing PTA.