Chapter 4 — EKG / Cardiovascular Testing

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Last updated 8:04 PM on 8/8/26
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15 Terms

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12-lead EKG

Uses 10 electrodes to produce 12 leads

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P wave

Atrial depolarization

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QRS complex

Ventricular depolarization

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T wave

Ventricular repolarization

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PR interval

Normally about 0.12 to 0.20 seconds

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V1

4th intercostal space at the right sternal border

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V2

4th intercostal space at the left sternal border

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V4

5th intercostal space at the midclavicular line

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Somatic tremor artifact

Caused by shivering or muscle movement

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AC interference

Electrical interference that can cause EKG artifact

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Interrupted baseline

Often caused by a loose or disconnected electrode

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Wandering baseline

May result from movement, breathing, or poor electrode contact

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Preparing skin for EKG

Clean and dry the skin to improve electrode contact

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EKG patient instruction

Remain still and breathe normally

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Life-threatening EKG finding

Report to the provider immediately