Chapter 5 - Junctional Rhythms
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22 Terms
When the AV junction paces the heart, which direction does it travel to activate the atria?
Retrograde (backwards)
What is a PJCs?
Premature Junctional Complexes
When does a PJC occur?
When an irritable site within the AV junction fires before the next expected sinus beat
How long will the QRS be for PJCs?
0.11 or less
What is the Rhythm for PJCs
Irregular
Why are PJC rhythm irregular?
Early or premature beats
What is the rate of PJC?
60 to 100
What are the P waves for PJCs?
P wave may not be present but can occur before, during, after, if seen its inverted
TRUE or FALSE: PJCs is an entire rhythm
FALSE; it is a single beat
What causes PJC?
Stimulants
Electrolyte imbalance
Rheumatic heart disease
What is done about PJC?
Generally nothing, but if cardiac output is
What are Junctional escape beats?
A protective measure preventing cardiac standstill
Rhythm of Junctional escape beat?
Irregular
Why are Junctional escape beat rhythm irregular?
Early beats
What is the rate of Junctional escape beats?
60 - 100
What are the P waves for Junctional escape beats?
Can occur during, before, after the QRS, if seen it is inverted (Junctional escape beat)
What is the PR interval for PJCs?
less than 0.12 seconds
What is Junctional rhythm?
Several sequential junctional escape beats
What is the rhythm of Junctional rhythm?
Regular
What are the P waves for Junctional rhythm?
May occur before, during, or after the QRS; if visible, P wave is inverted
What is done about Junctional escape beat if it is symptomatic?
Apply pulse oximeter
Establish IV
12-lead ECG
Administer atropine