Resultado de búsqueda
Coronary collaterals are an alternative source of blood supply to myocardium jeopardized by ischaemia. In comparison with other species, the human coronary collateral circulation is very well developed. Among individuals without coronary artery disease (CAD), there are preformed collateral arteries preventing myocardial ischaemia during a brief ...
27 de abr. de 2014 · Coronary distribution in the heart is not always standard. Some vessels are more important than others. Collateral or alternative vessels may develop around a blocked artery in an attempt to maintain circulation. Certain medications may enhance this development. Similarly, not overtaxing the heart may facilitate this collateral circulation.
Coronary collateral circulation confers a protective blood supply to the myocardium jeopardized by ischemia. During embryological development, an extensive overlay of inter coronary anastomoses derives from endothelial precursor cells which, in response to local signals, migrate and differentiate into new vessels in a process termed vasculogenesis .
N2 - Background: The Japanese Channel (J-Channel) score was introduced to aid in retrograde percutaneous coronary intervention (PCI) of chronic total coronary occlusions (CTOs). The predictive value of the J-Channel score has not been compared with established collateral grading systems such as the Rentrop classification and Werner grade.
30 de jul. de 2019 · Coronary collaterals in patients without coronary atherosclerosis range in calibre between 10–200 µm; collateral arteries of patients with CAD are approximately four times bigger (100–800 µm) . This observation is in accordance with an experimental rabbit model, where occlusion of the femoral artery increased the lumen diameter of pre-existent arterioles four- to fivefold [ 18 ].
5 de jun. de 2013 · The analysis of a database on quantitative invasive collateral assessment has provided clinical and haemodynamic data of 845 individuals (age, 62 ± 11 years), 106 patients without CAD and 739 patients with chronic stable CAD, who underwent a total of 1053 quantitative, coronary pressure-derived collateral measurements between March 1996 and April 2006. 32 All patients have been prospectively ...
Abstract. A chronic total occlusion (CTO) describes a completely occluded coronary artery. This type of lesion is found in about 18% of all significant lesions in patients with coronary artery disease. A system of collateral connections are observed in almost all of these lesions, which have the capacity to prevent myocardial necrosis and may ...
