Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Cardiac Physiology

Lab Study Guide

lubb -come first -closure of AV valves
dupp -comes second -closure of SL valves
when ventricles contract AV valves open or close? close
when atria contract AV valves open or close? open
when ventricles relax AV valves open or close? open
when atria relax AV valves open or close? close
path of electrical activity - SA node -atrial contraction -AV node -AV bundle -R/L bundle branches -Purkinje fibers (conduction myofibrils) -ventricular contraction
systole contraction
diastole relaxation
p wave atrial depolarization (causes systole)
QRS complex ventricular depolarization (causes systole)
when do the atria repolarize? during the QRS complex but the large electrical activity of the ventricular depolarization masks atria repolarization
t wave ventricular repolarization (causes diastole)
significance of PQ segment -start of atrial depolarization to start of ventricular depolarization -measures time it takes to get from AV node to ventricles
significance of PR interval -time from atrial depolarization to beginning of ventricular depolarization -time to transmit action potential through entire conduction system -reflects whether impulse conduction from atria to ventricles is normal
significance of ST segment -normally remains isoelectric (no electrical activity) -interval between ventricular depolarization and repolarization
significance of QT interval includes all electrical events from ventricular repolarization to depolarization
cardiac cycle complete cycle of contraction and relaxation of all four chambers of the heart
R-R interval heart rate
calculating HR given cardiac cycle -HR = 60/CC -answer in BPM
calculating cardiac cycle given HR -CC = 60/HR -answer in seconds
wave electrical changes with depolarization and repolarization
segment (on line) between waves
interval wave and segment
Created by: studystack_0325