Placement of electrodes and leads
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Limb leads | Placed on arms and legs with tab of electrode pointing toward the center of the body
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| V1 | Fourth intercostal space (ICS) on the right sternal border
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| V2 | Fourth intercostal space (ICS) on the left sternal border
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| V3 | Midway between V2 and V4
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| V4 | Mid-clavicular line at 5th intercostal space (ICS)
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| V5 | Anterior axillary line at 5th ICS (horizontal to V4)
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| V6 | Mid-axillary line at 5th ICS (horizontal to V4)
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| Lead I | Right arm (-) to left arm (+)
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| Lead II | Right arm (-) to left leg (+)
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| Lead III | Left arm (-) to left leg (+)
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| aVR | Right arm (+) and midpoint of left arm and left leg (-)
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| aVL | Left arm (+) and midpoint of right arm and left leg (-)
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| aVF | Left leg (+) and midpoint of right arm and left arm (-)
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| Rhythm strip | Lead II
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| Right leg in ECG tracings is.... | Ground lead
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| Usual speed of the ECG paper | 25 mm/second but can be adujusted if needed due to bradycardia (decreased) or tachycardia (increased)
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| Standardization | Usually 10 mm but can be increased or decreased (each ECG machine will have specific settings) to increase or decrease the size of the deflections on the tracing (see slides)
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| Holtor Monitor | ECG system that monitors heart activity for 24-48 hours (see slide - remember actual hookup varies according to specific equipment)
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Created by:
cskinner
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