PROPHECY EKG EXAMPREP STUDY
GUIDE ACTUAL QUESTIONS AND
CORRECT SOLUTIONS COMPLETE
◉where to put limb leads on 12 lead EKG . Answer: on wrists and
ankles
◉best lead for atrial rhythms . Answer: lead II
◉best lead for ventricular rhythms . Answer: V1
◉SA node intrinsic rate . Answer: 60-100
◉AV node intrinsic rate . Answer: 40-60
◉atrial depolarization . Answer: P wave
◉PR interval . Answer: measured BEFORE P WAVE and AT THE Q
norm: 0.12-.20s
, ***its too long if it is longer than 5 little boxes or one big box
◉normal PR Interval . Answer: 0.12-0.20 seconds
◉ventricular depolarization . Answer: QRS complex
◉ventricular repolarization . Answer: T wave
◉absolute refractory period . Answer: The minimum length of time after
an action potential during which another action potential cannot begin
-toilet theory
-problem when QT interval increases
◉5 large boxes . Answer: 1 second
◉15 large boxes . Answer: 3 seconds
◉30 large boxes . Answer: 6 seconds
◉normal P wave . Answer: less than 0.12
GUIDE ACTUAL QUESTIONS AND
CORRECT SOLUTIONS COMPLETE
◉where to put limb leads on 12 lead EKG . Answer: on wrists and
ankles
◉best lead for atrial rhythms . Answer: lead II
◉best lead for ventricular rhythms . Answer: V1
◉SA node intrinsic rate . Answer: 60-100
◉AV node intrinsic rate . Answer: 40-60
◉atrial depolarization . Answer: P wave
◉PR interval . Answer: measured BEFORE P WAVE and AT THE Q
norm: 0.12-.20s
, ***its too long if it is longer than 5 little boxes or one big box
◉normal PR Interval . Answer: 0.12-0.20 seconds
◉ventricular depolarization . Answer: QRS complex
◉ventricular repolarization . Answer: T wave
◉absolute refractory period . Answer: The minimum length of time after
an action potential during which another action potential cannot begin
-toilet theory
-problem when QT interval increases
◉5 large boxes . Answer: 1 second
◉15 large boxes . Answer: 3 seconds
◉30 large boxes . Answer: 6 seconds
◉normal P wave . Answer: less than 0.12