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Overview of Angiogenesis: Molecular and Structural Features
Published in Robert J. Gropler, David K. Glover, Albert J. Sinusas, Heinrich Taegtmeyer, Cardiovascular Molecular Imaging, 2007
Arye Elfenbein, Michael Simons
In contrast to these angiogenic sprouts, neovascularization that involves the recruitment or development of collateral blood vessels is designated as arteriogenesis. This includes the functional activation of existing collateral circulation, the maturation of undeveloped secondary blood routes, or even the de novo formation of collateral vessels. Arteriogenesis often represents a localized primary response to conditions such as vascular stenosis, and represents an effective means of re-establishing adequate blood flow.
Clinical Effects of Pollution
Published in William J. Rea, Kalpana D. Patel, Reversibility of Chronic Disease and Hypersensitivity, Volume 5, 2017
William J. Rea, Kalpana D. Patel
Nonarteriosclerotic inflammatory disease of large-caliber arteries results in acute or chronic spasm and eventually, occlusion in some patients. Depending on collateral circulation, severe complications can follow, with a spectrum of symptoms ranging from organ necrosis to transient signs of ischemia.
Radial access for peripheral vascular intervention: the S.M.A.R.T. RADIANZ Vascular Stent System
Published in Expert Review of Medical Devices, 2023
Vinayak Subramanian, Antoine Sauguet, Martin Werner, Paolo Sbarzaglia, Klaus A. Hausegger, Gilles Goyault, Mercedes Guerra, Koen Deloose, Andrea Kahlberg, Giovanni Balestriero, Marianne Brodmann, Christoph Binkert, Yann Goueffic, Gerd Groezinger, Arne Schwindt, Oliver Schlager, Luca Bertoglio, George Adams, Nusrath Sultana, Raphaël Coscas
There are a few limitations to the widespread adoption of radial access for peripheral intervention. First, contemporary devices are not long enough to address distal lesions beyond the femoropopliteal bed, and treatment of below-the-knee disease using TRA is not feasible. Second, the distance between the access site and the lesion limits the support, stability, and maneuverability required for a successful intervention. Third, radial to peripheral procedures require specialized room setup and additional training of the interventionist and support staff. Fourth, some device categories are not available in a radial to peripheral configuration (e.g. atherectomy, drug-coated devices, thrombectomy). The use of brachial access can reduce the length requirement of devices. Recent analysis from large registries have demonstrated higher rates of complication with the use of percutaneous brachial artery access [18]. In addition, the brachial artery does not have a strong collateral circulation, and the risk of upper limb ischemia in the event of brachial artery occlusion is higher.
The modified Allen test and a novel objective screening algorithm for hand collateral circulation using differential photoplethysmography for preoperative assessment: a pilot study
Published in Journal of Medical Engineering & Technology, 2020
Hand ischemia is a severe complication that can occur due to one of the following procedures: radial/ulnar artery cannulation, heart catheterisation (HC), transradial/transulnar percutaneous coronary intervention (PCI) or coronary artery bypass grafting (CABG) [1,2]. Investigating the collateral circulation of a hand before conducting these procedures reduces the possibility of developing artery thrombosis and hand ischemia. Allen, Barbeau and Doppler/Duplex ultrasonic tests are the current most common assessments for screening/investigating whether the radial/ulnar artery can be safely conducted [3–6]; each of these assessments has some pros and cons. This pilot study introduces a new alternative assessment using the photo-plethysmography (PPG) technology along with an artery-access recommendation algorithm.