Impaired conduction of an impulse backward from the ventricles or atrioventricular node into the atria.
What Are CAPTCHAs?Wherever we go on the internet, we encounter CAPTCHAs, those twisted words that block or enable entries on websites. But, what does CAPTCHA mean?
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.