Basic Dysrhythmias Questions And Answers
Artifact 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 a...
Artifact 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 PR Interval: .12-.20 seconds
QRS Interval: < .12 seconds
Origin of Rhythms 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)
, Basic Dysrhythmias Questions And Answers
AV Blocks (AV node blocking some or all of the passage of electricity through it)
Sinus Arrhythmia (SA) Normal except irregular
The difference between the fastest two heart beats (from 1 QRS to the next QRS) and the
slowest two heart beats is greater than .12 sec
Asystole No electrical activity
CODE BLUE
but it does arise from the SA node??
Pulseless Electrical Activity (PEA) Normal rhythm, but...No Pulse*
Electrical activity is present but there is no pulse, so the heart is not beating! Something has
happened to prevent the muscular tissue from responding to the electrical activity
(i.e. ↓↑ K+, hypothermia, Pneumothorax, cardiac tampanode, hypovolemia, drug overdose,
pulmonary or coronary thrombosis)
Rhythms arising from the SA Node Sinus Rhythm
Sinus Tachycardia
Sinus Bradycardia
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