Please note: reference image is displayed in place of Flash media.
Heart block is an arrhythmia in which electrical signals traveling from the atria to the ventricles are stopped or delayed.
The electrical system of the heart is made up of several parts that communicate with one another to signal the heart muscle fibers when to contract. The SA node starts the signal causing the atria to contract. This signal travels through the AV node and on to the bundle of His, bundle branches, and Purkinje fibers causing the ventricles to contract. The flow of electrical signals is what produces a normal heartbeat.
In heart block, the normal electrical signals are either delayed or stopped as they travel from the SA node through the atria to the AV node and the ventricles. As a result, the heart may beat too slowly.
©2021 Medmovie.com. All rights reserved. Medmovie.com creates and licenses medical illustrations and animations for educational use. Our goal is to increase your understanding of medical terminology and help communication between patients, caregiver and healthcare professionals. The content in the Media Library is for your information and education purposes only. The Media Library is not a substitute for professional medical advice, diagnosis or treatment for specific medical conditions.