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Junctional Complexes and Rhythms/ Alterations in Conduction
Terms in this set (29)
what part of the AV junction does not have pacemaker cells (a little filter)?
when an impulse is traveling the normal conduction pathway, in the proper direction (upright p wave)
when an impulse is going backwards (inverted p wave)
inverted P wave before qRs
when an SA node doesn't fire, the AV node becomes the primary pacer and the impulse goes back up to depolarize ATRIA 1st the p wave is _____
inverted P wave buried in qRs complex
when an impulse splits in half, and half the atria and half the ventricles depolarize the p wave is _____
inverted P wave after the qRs
when the AV junction fires and depolarizes the ventricles then back up to the atria, the p wave is ____
inverted P b/4 or after qRs or no p wave
what is the difference between a junctional complex p wave and a sinus p wave?
premature junctional complex
a complex that interrupts a rhythm with an inverted P wave b/4 or after qRs or no wave
what are the criteria of a junctional rhythm (escape)? the SA node is no longer functioning
Rate: ____ - ____
R-R always ____
an inverted T wave shows sign of _____
>61 and <100
what is the rate of an accelerated junctional rhythm (ECG criteria is the same as a junctional complex)
what is the rate of junctional tachycardia? (ECG criteria same as junctional complex)
dependent on HR
(brady= Atropine, tachy= adenosine)
(unstable: TCP or synchronized cardioversion)
what is the treatment for a junctional rhythm?
when conductivity is suppressed between the atria and ventricles
what is a normal PRI?
1st degree AVB
2nd degree AVB type 2
what are the two blocks with a consistent PR interval?
2nd degree AVB type 1
3rd degree AVB
what are the two blocks with an inconsistent PR interval
>0.20 and <0.40
a 1st degree AV block has a constant PRI but it's length is ____ but ____ seconds (AV node holds onto the impulse longer)
4. O2, IV access
5. notify MD
what are the 5 priority steps to take when b/4 treating a patient?
atropine 0.5 mg IVP
what is the treatment for a symptomatic first degree AV block?
unstable 1st degree block?
more Ps than QRS
what is the red flag that the patient is in 2nd or 3rd degree AV block?
2nd degree AV block, type 1 (Wenckebach)
"normal, longer, longer, drop must be wenckebach"
# P > # qRs, PRI progressively longer, 1 P not conducted in a series, R-R is not equal but P-P is equal
atropine 0.5 mg IVp
TCP or TVP
what is the treatment for symptomatic 2nd degree Type 1? unstable 2nd degree type 2?
second degree AV block, type II
# of Ps is greater than # QRS, consistent PRI
(patients are more critically unstable)
2nd degree AV block, Type II: "low block" (below the AV junction)= ____ qRs
2nd degree AV block Type II: "high block" (within the AV node)= ____ qRs
a 2nd degree type II or a 3rd degree block no matter the stability calls for what treatment
third degree AV block
P-P is =
R-R is =
the # of p's > # qRs, PRI is not consistent and the P is not related to qRs
qRs, P, T....must be 3rd degree
what is the saying to determine that it is a red flag 3rd degree block?
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