Annals of Cardiovascular and Thoracic Surgery

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CHRONIC ARTERIAL OCCLUSION

This chapter focuses on the chronic arterial occlusion. the traditional response to stenosis or occlusion of a main artery is that the development of a collateral circulation. This accessory circuit, using pre-existing side branches of the most artery above and below the occlusion, is brought into play by the pressure gradient across the world of narrowing or blockage. The efficiency of the collateral circulation depends on two main factors. the primary is that the anatomical site and therefore the extent of the occlusions. a brief segmental occlusion in an artery well-endowed with side branches is probably going to cause less clinical disturbance than a more extensive occlusion in a neighborhood with relatively few potential collaterals. The second factor is that the time course of the occlusive process. In condition , the ultimate occlusion is typically preceded by an increasing stenosis over a substantial period of your time . The pressure gradient engendered by the stricture causes the collateral network to function and therefore the eventual complete occlusion of the most artery is well compensated.
• Chronic coronary total occlusion (CTO) occurs when it has become completely blocked or occluded for 3 months or longer. Approximately 15 to twenty percent of individuals with arteria coronaria disease have a CTO.

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