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ekg

city wide training

QuestionAnswer
Inherent rate of SA node? 60-100
Inherent rate of AV node? 40-60
Inherent rate of Bundle of His? 20-40
Inherent rate of R and L Bundle Branches? 20-40
Inherent rate of Purkinje fibers? 20-40
Depolarization excited, contraction
Repolarization calm, relaxed
What is the primary direction of electrical current from the heart? rt shoulder to left hip
Lead II + electrode is where? + left leg
Lead IV + electrode is where? +4th intercostal, rt sternal border
Depolarization of atria is what wave? p wave
PR interval represents what? Is normally how long? time for impulse to spread thru atria and AV node. 0.12 to 0.20 seconds.
What can’t happen during the absolute refractory period? no amount of electrical stim can cause depolarization because it’s already fully depolarized.
Normal qrs wave is how long? And measured from what to what? 0.12 measured from beginning of q to end of s
Ventricular repolarization is what wave? t wave
Qrs represents what? conduction of electrical impulse from AV node thru ventrical muscle and depolarization of rt and lt ventricals
What is a u wave? Is it normal represents repolarization of purkinje fibers. May represent problem such as hypokalemia, MI or CVA.
NSR: rate? pr interval? Qrs interval? 60-100, 0.12-0.20
Sinus tachy rate? 100-160
Sinus brady rate? 40-60
Sinus arrhythmia is what rhythm? What rate? regularly irregular, may be norm, brady or tachy
Sinus rhythm w/ 1st degree AV block (prolonged AV conduction time) pr interval is longer than norm.
Bundle Branch Block wide qrs, qt interval is opposite of qrs
Sinus pause regular w/ exception of missed complex
Premature atrial complex (PAC) rhythm? p wave? rhythm irregular d/t premature impulse, p wave for this complex looks different than the other p waves
A Flutter p wave looks like? Atrial rate? sawtooth, 250-350
Tachy rate? 100-160
Brady rate? 40-60
Pr interval longer than norm? Sinus with 1st AV block
Wide qrs, qt opposite deflection than qrs bbb
Rhythm is irreg. and P wave looks different than the others, can be be just 1 or more pac
No real p wave just squiggly. a fib
Adenosine is given for what? svt
Svt rate? 160-250
250-350 rate a flutter
Junctional rhythms. Rate? Accelerated rate? Tachy rate? 40-60, accel-60-100, 100-160-tachy
P wave may be buried in what rhythms? junctional and pjc
Premature impulse comes from where? Is called what av node or junction, pjc
Gradual slowing of conduction thru av node until 1 is completely blocked and then cycle repeats is called? 2nd depress av block type i or mobitz I
Sudden failure of av node to conduct 1 or more impulses is called what? 2nd degree av block type II or mobitzII
3rd degree av block is what? The Atrial rate is 60-100, and the ventricular rate is 20-40 complete failure of conduction of all sinus impulses resulting in 2 indep pacemakers.
Undersensing is what? pacer doesn’t see intrinsic impulse
Oversensing is what? see other electrical activity and thinks it’s an impulse but it’s not. Pt’s heart rate is less than what pacer is set at.
Wide, ugly qrs, no related p wave pvc
Rate 100-250, absent p wave, wide bizarre, ugly qrs v-tach
Chaotic electrical activity- v-fib
Flat or relatively flat asystole
No p waves, rate 20-40. Qrs wide, bizarre idioventricular rhythms
Idioventricular can be accelerated-rate? Or v-tach-rate? accel is 40-100, tach is 100+
When you see asystole look at what?? at least 2 leads!!
Created by: kerinska