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NSG 229 Test 3 With Complete Solution
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NSG 229 Test 3 WithComplete Solution
Action potential
when the action potential reaches a conduction point, if it isn't working, the
action simply moves on to the next place, still follows the plan - ANSWER
electrical impulse
cardiac output - ANSWER the amount of blood ejected from each ventricle
every minute
stroke volxHR=
if Heart is beating 100bpm, multiple stroke vol by 100.
stroke volume - ANSWER the amount of blood ejected from each ventricle
each beat
depolarization - ANSWER contraction "squeezing"
occurs during systole; blood is ejected and chamber empties
Repolarization - ANSWER relaxation
occurs during diastole; blood returns and chamber fills
SA node
can take out this part and the heart will still work; with
meds/therapy/procedures. - ANSWER conduction begins at the ____. "the
,pacemaker of the heart" the arrival of the action potential should cause the
atrium to contract.
this contraction is represented as the P wave.
P wave
the action potential moving through the atrium - ANSWER cannot be sinus
without a ___ wave
AV node - ANSWER the action potential moves from SA node to the ____,
causing another depolarization (squeeze). This helps completely empty the
atrium.
P wave and the beginning of the QRS complex
known as the PR interval - ANSWER there is a conduction delay through the
AV node. this accounts for the pause between the ___ and the beginning of
the ______.
PR interval - ANSWER tells us how long it takes for the action potential to
move through the atrium from beginning to end. "delay"
Systolic
measured from the R wave through the T wave - ANSWER the pressure inside
the vessels during the activity, the firing of SA node, the depolarization &
repolarization of the atrium, that pressure is the ____ number.
Diastolic
more concerned if this number is higher - ANSWER ____ pressure is measured
between beats, when the heart is resting. it represents atrial depolarization
(squeeze and empty) and the beginning of atrial reploarization (rest and
,refill)
Bundle of His - ANSWER once the action potential has moved through the AV
node it moves through the ______, which eventually splits and becomes the
Left Bundle Branch and the Right Bundle Branch.
ears nose fingers toes & hose (penis)
causes vasoconstriction = necrosis - ANSWER where are the places you cant
put epinephrine?
Right - ANSWER ____ sided HF causes edema
Left - ANSWER ____ sided HF causes cyanosis and confusion (mentating)
because you are not perfusing
Q segment - ANSWER the action potential arriving at the Bundle of His
causes depolarization (squeeze). this is represented on the EKG as the:
R segment - ANSWER the action potential reaching the L&R bundle branches
is represented by the:
you will not see an R wave; will not have strong ventricle squeeze - ANSWER
How would the EKG look if there was trouble at the Bundle of His?
Sodium, Potassium, Magnesium - ANSWER electrolytes involved in heart
contractility
Purkinje Fibers
this area is the last chance for the action potential to move blood from that
ventricle. - ANSWER the action potential moved through the atrium, to the
Bundle of His and through the L&R Bundle branches. the next stop is:
S segment - ANSWER the action potential depolarizing the Purkinje Fibers is
, represented on the EKG as the:
QRS complex - ANSWER represents the action potential moving through the
ventricles.
represents ventricular depolarization (squeeze) and we know the greater the
squeeze, the greater the stroke volume and the greater the cardiac output.
resting, refilling, repolarizing - ANSWER if the action potential is in the
ventricles then it isn't in the atrium, which means the atrium is:
T wave - ANSWER ventricular repolarization (resting & refilling) is
represented on the EKG by:
T wave & P wave - ANSWER the time it takes the action potential to move
from the Purkinje Fibers back to the Atrium is represented on the EKG by the:
blood pressure - ANSWER how do we measure the quality of depolarization
(squeeze) ?
Left and Right Bundle Branches - ANSWER the pressure is greatest when the
action potential has the greatest number conduction points responding.
So, the pressure is greatest when the action bundle reaches the:
-AV node is repolarizing
-Bundle of His is repolarizing
-SA node has depolarized and repolarized and is ready for another action
potential
-Purkinje Fibers on ready for depolarization
S1 sound "lub" - ANSWER _____ is associated with closure of the tricuspid and
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