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mariamv77060
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where is lead V1 placed at?
fourth intercostol space, left to the sternum
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where is lead V2 placed at?
fourth intercostol space, right of the sternum
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where is lead V3 placed at?
between V2 & V4. at a angle
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Where is lead V4 placed at?
fifth intercostal space left midclavicular
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Where is lead V5 placed at?
Fifth intercostol space anterior- axillary
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Where is lead V6 placed at?
Fifth intercostol space, midaxillary
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What is the Purpose of the EKG?
-used to record the electrical impulsses that produce the cardiac cycle.
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What is a electrocardiograph
the machine used to record electrical impulses on the electriocardiograms
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What is Deflections/
waves on the EKG that creates peaks and valleys
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How many Leads are used in the medical field?
we only use 10 but we get 12 lead readings.
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Limb leads aka ...
bipolar leads
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limb lead are placed on the arms and legs
(opposite sides)
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leads are placed on
deltoids and calfs
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Standard leads monitor
2 limb leads
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What monitors one limb lead and 1 precordial midway between the other 2 limbs
Augmented Voltage leads
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AVF stands for
Augmented Voltage Foot
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AVL stands for
Augmented Voltage Left
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AVR stands for
Augmented Voltage Right
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Leads are
electrodes placed on the body
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Precordial Leads aka
Chest leads
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How many leads are placed on intercostal spaces of the chest
6 unipolar leads (numbered V1-V6)
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The SA bundle Nodes conducts the
depolarization
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Depolarization means
shock to make atriums contract
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P wave
- first electrical impulse of depolarization in the atrium.
- small upward curve on tracing.
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Q wave
impulse traveling from the atrium down the septum, first downward curve on tracing
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R wave
- Large upward spike representing the impulse going through the left ventricle
- -this shows how hard the ventricle has to pump to send the blood through the aorta to the body
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S wave
Downward reflection and it represents impulse going through both of your ventricles
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T wave
- upward curve!!
- reflecting repolarization of the ventricles
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U wave
- small upward curve seen after T wave
- (not common)
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Repolorization means
- heart getting ready to get shocked
- (depolarization)
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20 little boxes create big box
4 big boxes creates 1 unit
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P-wave no bigger than two small boxes
Q-wave. a flat line or a downward spike no bigger than 2 small boxes
R-wave - should not be bigger than 2 big boxes (if bigger its abnormal)
S-wave-should be no bigger than 3 small boxes
Twave- no more than 2 small boxes height - and one small box wide
width shows how long it takes to recharge.
the higher the box the more intense the movement is
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Most common EKG artifact is
wandering baseline
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Artifacts of EKG
- alternating current interference(electrical pull)
- Somatic interference
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mounting EKGs are for
single channel EKG tracings only. Several type of mounts are slotted folders, and folders with self adhesive surfaces
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