, Updated Basic Dysrhythmias NURS402
Exam 2 Review Questions and Answers
100% Pass | Graded A+
EKG paper is divided into small squares and larger squares -
Answer>> Large squares are defined by a dark line. They are 5
squares high and 5 squares long (0.20 seconds)
Small squares may be lines or may be dots within the dark lines.
They are 0.04 seconds
every mark below EKG grid is 3sec
Artifact - Answer>> EKG waveforms from sources outside the
heart
Interference seen on a monitor or EKG strip
4 causes
Patient movement (i.e. pt. with tremors)
Loose or defective electrodes (fuzzy baseline)
Improper grounding (60 cycle interference)
Faulty EKG apparatus
Normal PR and QRS interval lengths - Answer>> PR
Interval: .12-.20 seconds
QRS Interval: < .12 seconds
Origin of Rhythms - Answer>> They are named for the structure
of the heart where the foci (a cell sending off an electrical
impulse) is located that is producing the abnormal rhythm
Sinus (Sinus node)
Junctional (Area between the atria & ventricles)
Ventricular (any cell in the ventricles)
Atrial (any cell in the atria)
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