1. what ventricle/atria
left ventricle/atria
car- ry oxygenated
blood
2. what ventricle/atria right ventricle/atria
car- ry de-
oxygenated blood
to feed the heart with
3. what is the function blood blockage = no
of the coronary oxygen to heart
arteries
automaticity- initiate impulses
4. list the unique excitability- respond to stimuli
proper- ties of conductivity- electrical impulse
cardiac muscle contractibility- shortening muscle
fibers
refractoriness- respond to electrical stimuli by depolarization,
absolute (not possible for excitation, no impulse), relative
(excitable but requires a strong stimuli = disorganized
rhythm)
5. the cardiac cycle is mechanical
elec- trical or
mechanical
systole (contraction) and diastole (relaxation)
6. what makes up the
car- diac cycle
the amount of blood pumped out of the ventricles in one minute
7. what is the
definition of cardiac
output depolarization and repolarization
8. what are 2
electrical events
of the heart
, ECG interpretation (Mayo) Exam Answered Correctly!!
9. define depolarization discharge state of myocardial cells or the action state/contraction
myocardial
10. define repolarization recovery state of myocardial cells or the resting state of myocardi
, ECG interpretation (Mayo) Exam Answered Correctly!!
11. list the order of the 1. SA node (60-100)
conduction system 2. intra-atrial pathways
with proper rates 3. AV node
4. junctional tissue (40-60)
5. bundle of HIS
6. bundle branches
7. purkinje fibers
8. ventricular tissue (20-40)
12. describe the SA node
in the conduction -normal pacemaker of the heart
system - 60-100 bpm
-located in RA
13. where is the SA node lo- located in the upper wall of the right atrium
cated on the heart
14. describe the intra-atrial - connect SA node to AV node
pathways in the conduc- - conducts the impulse from SA node to AV node
tion system
15. where are the intra-
atri- al pathways
located on the
heart
16. describe the AV node -located on the floor of RA
in the conduction -delays impulse from atria before it moves to ventricles
system