block

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Related to Bundle branch block: Left bundle branch block, Right bundle branch block

block

2. a casing housing one or more freely rotating pulleys
3. Pathol
a. interference in the normal physiological functioning of an organ or part
b. See heart block
c. See nerve block
4. Psychol a short interruption of perceptual or thought processes
5. Computing a group of words treated as a unit of data on a tape, disk, etc
6. Athletics short for starting block
7. Cricket a mark made near the popping crease by a batsman to indicate his position in relation to the wicket

Block

A large piece of stone, taken from the quarry to the mill for sawing and further working.

Block

 

in engineering:

(1) A unit of a mechanism in the form of a wheel with a groove around its circumference over which a cable or chain is drawn. It is used to change the direction of a tractive force and to obtain a force or velocity advantage; more rarely, to transfer a torque. Depending on their function, blocks are known as guide, balance, runner, and driving (for imparting rotary motion to a shaft) pulleys. In order to achieve a large force or velocity advantage, a lifting mechanism made up of a combination of blocks (a block and tackle) is used.

(2) A subassembly of a machine, consisting of several identical parts, such as a block of cylinders in an internal combustion engine or the spindle block in a multiple-spindle machine.

(3) A stone (concrete or ceramic) of large size (appreciably larger than a brick) used in the construction of buildings and for road surfacing.

N. IA. NIBERG

block

[bläk]
(computer science)
A group of information units (such as records, words, characters, or digits) that are transported or considered as a single unit by virtue of their being stored in successive storage locations; for example, a group of logical records constituting a physical record.
The section of a computer memory or storage device that stores such a group of information units. Also known as storage block.
To combine two or more information units into a single unit.
A contiguous group of text characters that is marked for moving, copying, saving, deletion, or some other word-processing operation.
(design engineering)
A metal or wood case enclosing one or more pulleys; has a hook with which it can be attached to an object.
(mining engineering)
A division of a mine, usually bounded by workings but sometimes by survey lines or other arbitrary limits.
In quarrying, a large portion of rock that is removed from the quarry as a solid mass for further processing at a mill.
(petroleum engineering)
The subdivision of a sea area for the licensing of oil and gas exploration and production rights.
(statistics)
In experimental design, a homogeneous aggregation of items under observation, such as a group of contiguous plots of land or all animals in a litter.

block

block, 6
1. A masonry unit; a concrete block.
2. (Brit.) A walling unit which exceeds in length, width, or height the dimensions specified for a brick.
3. A solid piece of wood or other material.
4. A plank or timber which serves as bridging between joists or the like.
5. In quarrying, the large piece of stone, generally squared, that is taken from the quarry to the mill for sawing, slabbing, and further working.
6. A mechanical

block

1. <unit> A unit of data or memory, often, but not exclusively, on a magnetic disk or magnetic tape.

Compare record, sector.

block

(1) A group of disk or tape records that is stored and transferred as a single unit. On a CD, a block consists of 98 frames of 33 bytes for a total of 3,234 bytes, or 1/75th of a second. See block level.

(2) A group of bits or bytes that is transmitted or processed as a single unit.

(3) A group of text characters that has been marked for moving, copying, saving or other operation.

(4) A rectangular group of pixels that are processed as a unit.

(5) A group of program statements that are treated as a unit based on the results of a comparison.
References in periodicals archive ?
Validation of electrocardiographic criteria for diagnosing acute myocardial infarction in the presence of left bundle branch block.
Overall, the findings of an incomplete right bundle branch block and mild sinus arrhythmia are signs of an athletic heart, and they are not likely to develop into an unhealthy condition.
Presence of T-wave changes or bundle branch block (LBBB or RBBB) in this cohort of patients with CCHF predicted death with a sensitivity of 72.
The Heartscape system can also assist with confounding factors such as Bundle Branch Blocks (eg, LBBBs), Early Repolarization, or Left Ventricular Hypertrophy (LVH).
2] High-risk is defined as QRS width >130 milliseconds with Left Ventricular Ejection Fraction < 30 percent and Left Bundle Branch Block (LBBB).
The panel voted in favor of the overall risk-benefit profile (Yes: 3 votes and No: 2 votes) The FDA will consider the Panel's feedback as it reviews Medtronic's request to expand its CRT-D indication to include New York Heart Association (NYHA) Class II heart failure patients with a left ventricular ejection fraction (LVEF) of less than or equal to 30 percent, left bundle branch block (LBBB), and a QRS duration greater than or equal to 120 milliseconds.
Electrocardiogram in July 2012 disclosed sinus rhythm (75 beats a minute) and complete left bundle branch block.
The QRS complex fragmentations, frequently seen on the surface electrocardiograms (ECGs) with narrow or wide QRS complex, include paced rhythm, bundle branch block or ventricular premature beats (1).
MADIT-CRT found that Left Bundle Branch Block (LBBB) is an objective discriminator for a positive response to CRT and women in the trial were more likely than men to have LBBB.
If approved, Boston Scientific would become the only company with an FDA-approved CRT-D for high-risk New York Heart Association (NYHA) Class I and II [1] patients with Left Bundle Branch Block (LBBB) morphology and sinus rhythm.
Another role that MSCT may have in the preoperative period is the detection of CAD in patients with left bundle branch block (LBBB).
ECG changes can include left bundle branch block, or an ST-segment elevation in leads V2 and V3 of at least 0.