Ch 4 Terms
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| Alternating Current (AC) interference | Unwanted markings on the ECG caused by other electrical current sources.
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| Angle of Louis | A ridge about an inch or so below the suprasternal notch where the main part of the sternum and the top of the sternum, known as the manubrium, are attached.
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| Anterior Axillary Line | An imaginary vertical line starting at the front axilla that extends down the left side of the chest.
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| Body mechanics | is using movements that maintain proper posture and avoid muscle and bone injuries (Table 4-1).
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| Dextrocaridia | When the heart is on the opposite or right side of the chest.
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| Intercostal space (ICS) | The space between two ribs.
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| Interrupted baseline | When one or more leads appears as a flat line on the ECG tracing. Usually caused by loose or unplugged leads.
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| Midaxillary line | An imaginary vertical line that starts at the middle of the axilla (armpit) and extends down the side of the chest.
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| Midclavicular Line | An imaginary line on the chest that runs vertically through the center of the clavicle.
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| Paraspinous Line | Imaginary line on the spine that runs vertically through the side of the spine.
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| Posterior Axillary LIne | Imaginary line on the back that runs vertically from the shoulder down on the outer edge of the rib cage.
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| Seizure | An interruption of the electrical activity in the brain that causes involuntary muscle movement and sometimes unconsciousness.
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| Somatic tremor | Voluntary or involuntary muscle movement; also known as body tremor.
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| Suprasternal Notch | The dip you feel at the anterior base of the neck just above the manubrium, where the clavicle attaches to the sternum.
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| Wandering baseline | Artifact in which the tracing drifts away from the center of the graph paper. Also known as baseline shift.
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| Midscapular Line | Imaginary line on the back that runs vertically through the center of the scapula.
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