heart electrical system

peacemaker of the heart

SA node

atrioventricular bundle

AV bundle

atrioventricular node

AV node

Bundle of His

AV bundle

sinoatrial node

sa node

Carry impulses through the ventricles and cause them to
contract

Purkinje fibers

Causes a delay in the conduction of the heart, allowing
the atria to fully empty and close their valves

av node

consists of a left and right side

bundle branches

Generates electrical impulses every 60 to 100 seconds

sa node

Located between the atria and ventricles

av node

Located within the right atrial wall

sa node

Long cells that spread through ventricular muscle tissue

Purkinje fibers

Passes the impulse to the AV node

sa node

Send impulses to the bundle branches

av bundle

Send impulses to the Purkinje fibers

bundle branches

Sends impulses to the AV bundle

av node

Triggers the atria to contract

sa node

What is arrhythmia?

Abnormal heart rhythm caused by the heart's electrical system

symptoms of arrhythmias

heart beating too fast, too slowly, or erratically

when atria contract, where does the blood get forced to

ventricles

what order does it go in

sa node, av node, av bundle, bundle branches, purkinje fibers

P wave

atrial triggering depolarization

sa node fires and the impulse through atria

p wave

P-Q interval

atrial depolarization is done

the impulse is delayed at the av node

P-Q interval

QRS complex

ventricular depolarization begins in the apex (the tip)

atrial repolarization occurs

QRS complex

What is depolarization?

contraction

What is repolarization?

relaxation

S-T segment

ventricular depolarization is complete

T wave

ventricular repolarization the apex tip