Block

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Related to First degree heart block: Second degree heart block, Third degree heart block

Block

A segment of a town or city surrounded by streets and avenues on at least three sides and usually occupied by buildings, though it may be composed solely of vacant lots. The section of a city enclosed by streets that is described by a map which indicates how a portion of land will be subdivided.

West's Encyclopedia of American Law, edition 2. Copyright 2008 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The most common arrhythmia was found to be Supra ventricular tachycardia (SVT) 126 (44%), followed by premature ventricular contractions (PVCs) 80 (28%), early repolarization 34 (11.9%), Atrial fibrillation (AF) 25(8.7%), first degree heart block 15(5.2%),inappropriate sinus tachycardia (IST) 6 (2.1%).
First degree heart block is a simple prolonging of the PR interval beyond the normals for age (see Figure 7).
First Degree Heart Block: Persons with PR intervals more than 0.20 sec were considered having first degree heart block.