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heart block

noun, Pathology
1.
a defect in the electrical impulses of the heart resulting in any of various arrhythmias or irregularities in the heartbeat.
Origin
1900-1905
1900-05
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for heart block
  • Some patients suffer nerve damage, others heart block or swollen joints.
British Dictionary definitions for heart block

heart block

noun
1.
impaired conduction or blocking of the impulse that regulates the heartbeat, resulting in a lack of coordination between the beating of the atria and the ventricles Also called Adams-Stokes syndrome, atrioventricular block
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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heart block in Medicine

heart block n.
A condition in which faulty transmission of the impulses that control the heartbeat results in a lack of coordination in the contraction of the atria and ventricles of the heart.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Article for heart block

lack of synchronization in the contractions of the upper and the lower chambers of the heart-the atria and the ventricles. The lack of synchronization may range from a slight delay in the ventricular contractions to total heart block, a complete lack of synchronization between the atria and the ventricles. A characteristic of heart block is that the ventricles contract more slowly than the atria. Heart block is caused by disease of some portion of the pathway over which the contractive impulse travels through the heart. The condition is treated by increasing the rate of impulses that regulate ventricular contractions; this can be done by administering drugs or by implanting an artificial pacemaker, a device that regulates heart action by means of minute electric shocks.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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