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32 Cards in this Set
- Front
- Back
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depolarization may be considered an advancing wave of ______ charges
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positive
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+ charge moving towards + electrode is recorded as ____ deflection
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positive
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atrial depolarization is recorded as a ___ wave on EKG
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p
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name 2 AV values
what side are they on |
tRIcuspid (RIght)
mitraL (Left) |
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order of ventrical depolarization
order of ventrical repolarization |
depolarization: endo-->epi
repolarization: epi-->endo |
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first downward wave of ventrical depolarization
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Q
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rapid phase of ventricular repolarization
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T wave
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EKG interval that correlates with duration of systole
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QT: begins with QRS and persists until end of T wave
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T or F: QT is considered normal when it is less than 1/4 R to R interval
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F: QT is normal when it is less than 1/2 R to R interval
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Time interval between two heavy black lines
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.2s
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Time interval between two light black lines
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.04s
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How many squares are between 2black lines
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5
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4 small squares represents ___ of a sec
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.16
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2 small squares represents ___ of a sec
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.08
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The amt of EKG paper that passes out of an EKG machine in .12sec is
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3 small squares
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which limb is positive in:
a. lead I b. lead II c. lead III |
a. left arm
b. left leg c. right arm |
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which limb is positive in:
a. AVR b. AVL c. AVF |
a. right arm
b. left arm c. left foot |
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a. lateral leads
b. inferior leads |
a. I and AVL (each has electrode on left arm)
b. II, III, AVF (each has a positive electrode positioned on left foot) |
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Name
a. right chest leads b. septal chest leads c. left chest leads |
a. V1, V2
b. V3, V4 c. V5, V6 |
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which leads are in the frontal plane
which leads are in the horizontal plane |
limb (I,II,III,AVR,AVL,AVF)
chest (V1-V6) |
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How does severe pain cause syncope
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parasympathetic reflex --> release of AcH --> slow rate of SA node pacing and dilation of systemic arteries (hypotension) to cause loss of consciousness
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2 indications for induced gagging or carotid sinus massage
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convert supraventricular tachycardia to sinus rhythm by inhibits irritable focus
2:1 AV block, atrial flutter inhibits AV node (increases refractoriness) |
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what 5 things do you need to consider when interpreting an EKG
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rate
rhythm axis hypertrophy infarction |
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inherent rate of
a. atria b. AV junction c. ventricles |
a. 60-80
b. 40-60 c. 20-40 |
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name the triplets (rate)
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300,150,100
75.60,50 |
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how do you determine rate of bradycardia
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count # cyclesin 6s strip *10
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which conduction tract innervates the left atrium
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bachmann's bundle
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3 types of irregular rhythms
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wandering pacemaker
multifocal atrial tachycardia afib |
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p wave shape varies
atrial rate <100 irregular ventricular rhythm |
wandering pacemaker
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what type of rhythm do you often see in pt with COPD
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multifocal atrial tachycardia
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p wave shape varies
atrial rate >100 irregular ventricular rhythm |
multifocal atrial tachycardia
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continuous chaotic atrial spikes
irregular venticular rhythm no p waves |
afib
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