CONDUCTING SYSTEM OF HEART

Conducting system of heart consists of Sinoarterial (SA) Node, Internodal Pathway, Atrioventricular (AV) node, His Bundle. Bundle branches and Purkinje Fibers.

Conducting System of Heart

Conduction is Fastest in Purkinje Fibers. Depolarization initiated in SA node spreads radially through the atria.

CONDUCTION VELOCITY IN CARDIAC TISSUE

INTERNODAL & INTERATRIAL PATHWAYS TRANSMIT CARDIAC IMPULSES THROUGH THE ATRIA

THE AV NODE DELAYS IMPULSE CONDUCTION FROM ATRIA TO VENTRICLES

This delay allows time for atria to empty their blood into the ventricles before ventricular contraction begins. A-V node and its adjacent conductive fibers delay the transmission.

AV NODAL DELAY

“Don’t be pushed around by the fears in your mind. Be led by the dreams in your heart.”
― Roy T. Bennett, The Light in the Heart

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