Review Note
Last Update: 11/20/2023 07:41 PM
Current Deck: anp 300 unit 3 labs and lectures
New Card (Unpublished)Currently Published Content
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Front
Commit #34748
conduction system of the heart
Back
Commit #34748
start: sinoatrial node (SA node): located in the upper wall of the right atrium
- where the impuse that initiates each heartbeat begins, "cardiac pacemaker": the depolarization that causes each impulse can be altered by the autonomic nervous system: parasympathetic (vagus nerve) will slow down the rate of contraction, sympathetic (sympathetic chain) will increase rate
the SA node will start atrial syncytium
from the SA node>> bachmann's bundle (to the left atrium), AV node (to go down to the ventricles)
from the AV node: bundle of HIS (beginning of the interventricular septum), separates into a left and right bundle branch (for the left and right ventricles), back up on the sides of the ventricles through the Purkinje fibers
- where the impuse that initiates each heartbeat begins, "cardiac pacemaker": the depolarization that causes each impulse can be altered by the autonomic nervous system: parasympathetic (vagus nerve) will slow down the rate of contraction, sympathetic (sympathetic chain) will increase rate
the SA node will start atrial syncytium
from the SA node>> bachmann's bundle (to the left atrium), AV node (to go down to the ventricles)
from the AV node: bundle of HIS (beginning of the interventricular septum), separates into a left and right bundle branch (for the left and right ventricles), back up on the sides of the ventricles through the Purkinje fibers