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block
(redirected from heart block)

    Also found in: Dictionary/thesaurus, Medical, Legal, Financial, Wikipedia, Hutchinson 0.04 sec.

(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.

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

Compare record, sector.
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Clonidine--may cause fatigue, bradycardia and/or heart block.
Optimizing cardiovascular drugs in patients who exercise by Ziccardi, James W. / AMAA Journal
You may have developed a medical condition called a heart block, which is a type of arrhythmia.
Don't ignore exertional heart irregularities. (The clinic) by Running & FitNews
A common effect is a decrease in conduction velocity through the atrioventricular node, which can result in heart block.
Effects of cardiovascular medications on exercise responses by Mossberg, Kurt A. / Physical Therapy
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