Cardiology Cardiac Conduction, Cycle

10 terms by KelliKMT

Create a new folder

Advertisement Upgrade to remove ads

Cardiology Module 12, Lesson 7; Cardiac Conduction and Cardiac Cycle

cardiac conduction

electrical impulses generated by specialized nodal tissue that travel through the heart wall

causing the myocardium to contract the heart chambers in a coordinated fashion

sinoatrial (SA) node

fires an electrical impulse that travels through the walls of the atria, signaling both the atria to contract and push blood into the ventricles

lies in the upper right atrium

sends impulse to the AV node

atrioventricular (AV) node

receives impulse from SA noded

lies between the atria and the ventricles

holds the electrical impulse for a fraction of a second allowing the atria to relax

sends the impulse down to the atrioventricular bundle

atrioventricular bundle (Bundle of His)

receives impulse from AV node

branches into the Purkinje fibers at the bottom of the ventricles

Purkinje fibers

signal both the ventricles to contract and push blood out to the lungs and to the rest of the body

cardiac cycle

the events that occur when the heart beats

heart beat

when the atria contract at the same time as the ventricles relax

beats about 60-80 times per minute

sinus rhythm

sequence of contraction and relaxation of the heart chambers

systole

refers to the contraction of the chambers

diastole

refers to the relaxation of the ventricles

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set