collateral circulation

collateral circulation n circulation of blood established through enlargement of minor vessels and anastomosis of vessels with those of adjacent parts when a major vein or artery is functionally impaired (as by obstruction) also the modified vessels through which such circulation occurs

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1. an alternative route provided for the blood by secondary vessels when a primary vessel becomes blocked.
2. the channels of communication between the blood vessels supplying the heart. At the apex of the heart, where the coronary arteries form anastomosis, these are very complex.

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circulation carried on through secondary channels after obstruction of the principal vessel supplying the part; called also compensatory c.

Medical dictionary. 2011.

Look at other dictionaries:

  • Collateral circulation — Collateral Col*lat er*al, a. [LL. collateralis; col + lateralis lateral. See {Lateral}.] 1. Coming from, being on, or directed toward, the side; as, collateral pressure. Collateral light. Shak. [1913 Webster] 2. Acting in an indirect way. [1913… …   The Collaborative International Dictionary of English

  • Collateral circulation — is when an area of tissue or an organ has a number of different pathways for blood to reach it. This is often as a result of anastamoses branches formed between adjacent blood vessels. An example of the usefulness of collateral circulation is a… …   Wikipedia

  • collateral circulation — noun : circulation of blood established through enlargement of minor vessels and anastomosis of vessels with those of adjacent parts when a major vein or artery is functionally impaired (as by obstruction); also : the modified vessels through… …   Useful english dictionary

  • collateral circulation — circulation of blood through a network of minor vessels that become enlarged and joined with adjacent vessels when a major vein or artery is impaired, as by obstruction. [1875 80] * * * …   Universalium

  • collateral circulation — 1) an alternative route provided for the blood by secondary vessels when a primary vessel becomes blocked. 2) the channels of communication between the blood vessels supplying the heart. At the apex of the heart, where the coronary arteries form… …   The new mediacal dictionary

  • collateral circulation test — see specific tests, including Korotkoff t., Pachon t., and tourniquet t. (defs. 2, 3) …   Medical dictionary

  • Leptomeningeal collateral circulation — The term leptomeningeal refers to the two deep layers of the meninges the pia mater and the arachnoid mater. The leptomeningeal collateral circulation is a network of blood vessels supplying the brain that follows a diffuse course over the… …   Wikipedia

  • Кровообращение Коллатеральное (Collateral Circulation) — 1. Альтернативный путь прохождения крови по боковым кровеносным сосудам при закупорке основных. 2. Артерии, соединяющие между собой снабжающие сердце ветви коронарных артерий. У верхушки сердца они образуют очень сложные анастомозы. Источник:… …   Медицинские термины

  • Collateral — Col*lat er*al, a. [LL. collateralis; col + lateralis lateral. See {Lateral}.] 1. Coming from, being on, or directed toward, the side; as, collateral pressure. Collateral light. Shak. [1913 Webster] 2. Acting in an indirect way. [1913 Webster] If… …   The Collaborative International Dictionary of English

  • Collateral assurance — Collateral Col*lat er*al, a. [LL. collateralis; col + lateralis lateral. See {Lateral}.] 1. Coming from, being on, or directed toward, the side; as, collateral pressure. Collateral light. Shak. [1913 Webster] 2. Acting in an indirect way. [1913… …   The Collaborative International Dictionary of English

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