MAYO ECG Exam Questions with 100% Correct
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Terms in this set (49)
PR interval represents: electrical conduction time from the atria to the AV
node
Is atrial flutter benign? no
PR interval .12-.20
QRS interval <.12
What lead do you look at V1
Interventions assess the patient
QRS wave ventricular depolarization
P wave atrial depolarization
AV node purpose delays impulse from atria before it moves to the
ventricles
Where do you place the lead? right sternal border, 4th intercostal space L!
, Rhythm with only p waves Ventricular standstill
SA node the node consisting of specialized cells capable of
automaticity at a rate of 60-100
Sinus Tachycardia a rhythm characterized by 100-160 beats per
minute
Automaticity the ability of the cell to spontaneously initiate an
impulse
Normal SR Impulse that initiates within the SA node at a rate of
60-100 bpm
Escape Rhythm or beat when the sinus node fails and a lower pacemaker
takes over
Sinus Pause or Arrest the sinus node fails to generate an impulse for one
or more beats
rate 40-60 junctional escape rhythm
p wave inverted, occurs before,
during, or after qrs
PR less than 0.12
rate 60-100 accelerated junctional rhythm
p wave inverted, occurs before,
during, or after qrs
PR less than 0.12
Answers | Verified | Latest Update 2026!!
Save
Terms in this set (49)
PR interval represents: electrical conduction time from the atria to the AV
node
Is atrial flutter benign? no
PR interval .12-.20
QRS interval <.12
What lead do you look at V1
Interventions assess the patient
QRS wave ventricular depolarization
P wave atrial depolarization
AV node purpose delays impulse from atria before it moves to the
ventricles
Where do you place the lead? right sternal border, 4th intercostal space L!
, Rhythm with only p waves Ventricular standstill
SA node the node consisting of specialized cells capable of
automaticity at a rate of 60-100
Sinus Tachycardia a rhythm characterized by 100-160 beats per
minute
Automaticity the ability of the cell to spontaneously initiate an
impulse
Normal SR Impulse that initiates within the SA node at a rate of
60-100 bpm
Escape Rhythm or beat when the sinus node fails and a lower pacemaker
takes over
Sinus Pause or Arrest the sinus node fails to generate an impulse for one
or more beats
rate 40-60 junctional escape rhythm
p wave inverted, occurs before,
during, or after qrs
PR less than 0.12
rate 60-100 accelerated junctional rhythm
p wave inverted, occurs before,
during, or after qrs
PR less than 0.12
