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Intrinsic Conduction
Sets the basic rhythm of the beating of the heart
Does not need the brain to tell it when to contract
Sinoatrial Node
Generates an electrical signal that causes the atria to contract
Body’s natural pacemaker
Atrioventricular Node
Responsible for ventricular contraction
0.1 s delay of impulse from SA node to AV node
May aid in heart muscle contraction if SA node activity has decreased
Purkinje Fibers
Cause contraction of papillary muscles and trabeculae carneae
Depolarization of the Atria
What happens from the firing of the SA node
Depolarization of the ventricles
What happens from the firing of the AV node
Depolarization of the Atria
What does the P wave represent?
Depolarization of the ventricles
What does the QRS Complex represent?
Repolarization of the ventricles
What does the T wave represent?
Purkinje Fibers
What does the blue box represent?
Left Bundle Branch
What does the blue box represent?
Right Bundle Branch
What does the blue box represent?
Bundle of His
What does the blue box represent?
AV node
What does the blue box represent?
SA Node
What does the blue box represent?