Dictionary.com
Thesaurus.com

heart block

American  

noun

Pathology.
  1. a defect in the electrical impulses of the heart resulting in any of various arrhythmias or irregularities in the heartbeat.


heart block British  

noun

  1. Also called: Adams-Stokes syndrome.   atrioventricular block.  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

"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

Etymology

Origin of heart block

First recorded in 1900–05

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

But later analysis concluded the ECG identified a complete heart block, also known as a third-degree heart block, the most serious kind.

From BBC

It later emerged the ECG showed signs of a "complete heart block" which can lead to sudden cardiac death.

From BBC

In a video statement, Dr. Eyal Nof said that the heart monitor had sounded an alert late Saturday after detecting a condition called heart block.

From Seattle Times

THE FACTS: In October, the FAA widened the acceptable parameters it uses when screening pilots for a specific heart condition called heart block, or AV block.

From Seattle Times

Then a couple of years ago my mum had a third-degree heart block and had to go to hospital where she was hooked up to so many different wires to monitor her health.

From The Guardian