2024 EKG NEW GRAD EXAM WITH
CORRECT ANSWERS
defibrillation - CORRECT ANSWERS-brief discharges of electricity are applied
across the chest to stop dysrhythmias (ventricular fibrillation)
Bundle branch block - CORRECT ANSWERS-QRS widens to greater than 0.12
sec
Normal PR interval length - CORRECT ANSWERS-0.12-0.20 seconds
QRS normal width - CORRECT ANSWERS-0.06-0.11
What do peaked T waves indicate? - CORRECT ANSWERS-High potassium
Patient management for 3rd degree heart block - CORRECT ANSWERS--
Immediate temporary pacemaker (transcutaneous, epicardial, or
transvenous)
Clinical consequences of 3rd degree AV block - CORRECT ANSWERS--Minimal
symptoms such as fatigue, dizziness, weakness and malaise
-*major life threatening symptoms* such as syncope, chest pain, confusion,
dyspnea, chest pain, hypotension, sudden death
synchronized cardioversion vs defibrillation - CORRECT ANSWERS-
synchronized cardioversion is performed when the patient is awake. If
patient is hemodynamically stable, premidicate w/ sedative (versed,
medazolam)
Which dysrhythmia is synchronized cardioversion used for? - CORRECT
ANSWERS--VT w/pulse
-supra-ventricular tachydrysrhythmia
Which dysrhythmias are defibrillation used for? - CORRECT ANSWERS--Vfib
-Pulseless VT
Capture - CORRECT ANSWERS-The ability of the electrical stimulus to initiate
a depolarization
, Pacing - CORRECT ANSWERS-Pacing is simply the firing of electrical energy
by the pulse generator. Firing is the ability of the pulse generator to initiate
an impulse.
Pacing spike - CORRECT ANSWERS-Every time the pulse generator initiates
an electrical impulse, you should see a pacing spike on the ECG tracing. The
pacing spike isa vertical upright line.
Sensing - CORRECT ANSWERS-Sensing is the ability of the pacemaker to
"see" the heart's electrical activity. This ability allows the pacemaker to
response appropriately and not interfere with the heat's intrinsic activity.
Failure to Sense (undersensing) - CORRECT ANSWERS--The pacemaker fails
to recognize spontaneous depolarization
-*Pacer spikes follows closely behind QRS Complex*
Failure to sense (oversensing) - CORRECT ANSWERS-Pacemaker *spikes
occurring at a slower rate than the pacemaker's preset rate* or no paced
beats even though the pacemaker's preset rate is greater than the patient's
intrinsic rate
Failure to capture - CORRECT ANSWERS--Inability of pacemaker stimulus to
depolarize myocardium
-You will see a pacing artifact or a spike, but no beat will follow
Failure to pace - CORRECT ANSWERS--occurs when the pacemaker should be
delivering an impulse but does not
-the patient intrinsic rate decreases below the preset limit, but the
pacemaker does not initiate an electrical response
QT interval normal length - CORRECT ANSWERS-0.36-0.44
EKG paper one small box - CORRECT ANSWERS-0.04 seconds
EKG paper one big box - CORRECT ANSWERS-0.20 seconds
Measuring rate 6 second method - CORRECT ANSWERS-Count number of R
waves and multiply by 10
Measuring rate by division - CORRECT ANSWERS-Count large boxes between
2 R waves and divide by the number of large boxes. Ex: 300/3.4
What causes artifacts on an EKG? (3) - CORRECT ANSWERS-1. Loose
electrode that is not in contact with the skin
2. A broken cable
CORRECT ANSWERS
defibrillation - CORRECT ANSWERS-brief discharges of electricity are applied
across the chest to stop dysrhythmias (ventricular fibrillation)
Bundle branch block - CORRECT ANSWERS-QRS widens to greater than 0.12
sec
Normal PR interval length - CORRECT ANSWERS-0.12-0.20 seconds
QRS normal width - CORRECT ANSWERS-0.06-0.11
What do peaked T waves indicate? - CORRECT ANSWERS-High potassium
Patient management for 3rd degree heart block - CORRECT ANSWERS--
Immediate temporary pacemaker (transcutaneous, epicardial, or
transvenous)
Clinical consequences of 3rd degree AV block - CORRECT ANSWERS--Minimal
symptoms such as fatigue, dizziness, weakness and malaise
-*major life threatening symptoms* such as syncope, chest pain, confusion,
dyspnea, chest pain, hypotension, sudden death
synchronized cardioversion vs defibrillation - CORRECT ANSWERS-
synchronized cardioversion is performed when the patient is awake. If
patient is hemodynamically stable, premidicate w/ sedative (versed,
medazolam)
Which dysrhythmia is synchronized cardioversion used for? - CORRECT
ANSWERS--VT w/pulse
-supra-ventricular tachydrysrhythmia
Which dysrhythmias are defibrillation used for? - CORRECT ANSWERS--Vfib
-Pulseless VT
Capture - CORRECT ANSWERS-The ability of the electrical stimulus to initiate
a depolarization
, Pacing - CORRECT ANSWERS-Pacing is simply the firing of electrical energy
by the pulse generator. Firing is the ability of the pulse generator to initiate
an impulse.
Pacing spike - CORRECT ANSWERS-Every time the pulse generator initiates
an electrical impulse, you should see a pacing spike on the ECG tracing. The
pacing spike isa vertical upright line.
Sensing - CORRECT ANSWERS-Sensing is the ability of the pacemaker to
"see" the heart's electrical activity. This ability allows the pacemaker to
response appropriately and not interfere with the heat's intrinsic activity.
Failure to Sense (undersensing) - CORRECT ANSWERS--The pacemaker fails
to recognize spontaneous depolarization
-*Pacer spikes follows closely behind QRS Complex*
Failure to sense (oversensing) - CORRECT ANSWERS-Pacemaker *spikes
occurring at a slower rate than the pacemaker's preset rate* or no paced
beats even though the pacemaker's preset rate is greater than the patient's
intrinsic rate
Failure to capture - CORRECT ANSWERS--Inability of pacemaker stimulus to
depolarize myocardium
-You will see a pacing artifact or a spike, but no beat will follow
Failure to pace - CORRECT ANSWERS--occurs when the pacemaker should be
delivering an impulse but does not
-the patient intrinsic rate decreases below the preset limit, but the
pacemaker does not initiate an electrical response
QT interval normal length - CORRECT ANSWERS-0.36-0.44
EKG paper one small box - CORRECT ANSWERS-0.04 seconds
EKG paper one big box - CORRECT ANSWERS-0.20 seconds
Measuring rate 6 second method - CORRECT ANSWERS-Count number of R
waves and multiply by 10
Measuring rate by division - CORRECT ANSWERS-Count large boxes between
2 R waves and divide by the number of large boxes. Ex: 300/3.4
What causes artifacts on an EKG? (3) - CORRECT ANSWERS-1. Loose
electrode that is not in contact with the skin
2. A broken cable
