- entrance block
- in cardiology, a unidirectional impasse to conduction that prevents an impulse from entering a specific region of excitable tissue; it is part of the mechanism underlying parasystole.
Medical dictionary. 2011.
entrance block
Look at other dictionaries:
entrance — noun 1 door/place through which you enter sth ADJECTIVE ▪ narrow, wide ▪ main ▪ back, front, rear, side ▪ … Collocations dictionary
Block — (bl[o^]k), v. t. [imp. & p. p. {Blocked} (bl[o^]kt); p. pr. & vb. n. {Blocking}.] [Cf. F. bloquer, fr. bloc block. See {Block}, n.] 1. To obstruct so as to prevent passage or progress; to prevent passage from, through, or into, by obstructing the … The Collaborative International Dictionary of English
Block Party Bash — Disney s California Adventure Opening date May 5, 2005 Closing date January 6, 2008 … Wikipedia
Block — [bläk] [after Adriaen Block, 17th c. Du navigator who explored it] island in S R.I., at the entrance to Long Island Sound … English World dictionary
Block Island — Block′ Is′land n. geg an island off the coast of and a part of Rhode Island, at the E entrance to Long Island Sound … From formal English to slang
block — 1. To obstruct; to arrest passage through. 2. A condition in which the passage of an electrical impulse is arrested, wholly or in part, temporarily or permanently. 3. SYN: atrioventricular b.. [Fr. bloquer] alveolocapillary b. the presence of… … Medical dictionary
Block Island — an island off the coast of and a part of Rhode Island, at the E entrance to Long Island Sound. * * * Island, Rhode Island, U.S. It lies at the eastern entrance to Long Island Sound, 9 mi (15 km) southwest of Point Judith, R.I. It has an area of… … Universalium
Block Island — Infobox Settlement official name = New Shoreham, Rhode Island settlement type = Town nickname = imagesize = image caption = image mapsize = map caption = mapsize1 = map caption1 = subdivision type = Country subdivision type1 = State subdivision… … Wikipedia
block — 1 noun (C) 1 SOLID MASS a solid mass of hard material such as wood or stone with straight sides (+ of): a block of ice 2 STREET/STREETS a) AmE the distance along a city street from where one street crosses it to the next: It s three blocks to the … Longman dictionary of contemporary English
block signal — noun also block signal system : a fixed signal at the entrance of a block to govern railroad trains entering and using that block compare block system 2 * * * block signaling. a fixed railroad signal governing the movements of trains entering and … Useful english dictionary
