How is the heart impulse spread?

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Expert Solution

ANSWER -

There are 5 parts in heart takes part in electrical conductivity or impulse transfer through out the heart.
CONDUCTION SYSTEM OF HEART ARE: SV NODE (sino atrial node) ,INA pathway (internodal atrial pathway ),AV node (atrio ventricular node), BUNDLE OF HIS and PURKINJEE FIBERS.
STEPS OF ELECTRICAL CONDUCTION:

SA node will start the sequence by making the heart atrial muscle contract. SA also known as anatomical pacemaker. In the right and left atria the signals make the muscle cells of atria contract and pumping the blood into the ventricles also triggered by signal.
Then the signal travels through AV node.
Then through the BUNDLE OF HIS and to the bundle branches which are spread throughout the walls.
Then the signal travels through PURKINJEE FIBRES , where that causes ventricles to contract.

By simplyfying the stages

SA node impulse generation (pacemaker)
AV node impulse conduction
Av bundle impulse conduction
Purkinje fibers impulse conduction- which results ventricles to contract.

Sydney Mullin answered 1 year ago

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