Heart Conduction System (Cardiac Conduction) - Cleveland Clinic Atrioventricular node Your atrioventricular (AV) node, located near the central area of your heart, delays the SA node’s electrical signal It delays the signal by a consistent amount of time (a fraction of a second) each time The delay ensures that your atria (upper heart chambers) are empty before the contraction stops
Conducting System of the Heart - Bundle of His - SA Node . . . The AV node acts to delay the impulses by approximately 120ms, to ensure the atria have enough time to fully eject blood into the ventricles before ventricular systole The wave of excitation then passes from the atrioventricular node into the atrioventricular bundle
what is meant by AV delay and what purpose does the delay serve Ensures Sequential Contraction: The delay allows the atria to fully contract and empty their contents into the ventricles before the ventricles begin their contraction This sequential contraction ensures efficient blood flow from the atria to the ventricles, and then out to the body
Why Are The Electrical Impulses Slowed By The . . . Key Takeaways: Atrioventricular Node Critical Delay: The AV node slows impulses to allow complete ventricular filling Prevention of Arrhythmias: Delays prevent rapid ventricular response and arrhythmias Coordinated Heart Function: Ensures synchronized contractions for optimal blood flow
How does the conduction system flow through the heart? The AV node serves as the electrical gateway to the ventricles It delays the passage of electrical impulses to the ventricles This delay is to ensure that the atria have ejected all the blood into the ventricles before the ventricles contract