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20 Cards in this Set
- Front
- Back
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Why must an electrolyte be used when recording an electrocardiogram?
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It facilitates the transmission of the heart's electrical impulse.
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Where does Lead I of the bipolar leads point?
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RA--->LA
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Where does Lead II of the bipolar leads point?
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RA--->LL
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Where does Lead III of the bipolar leads point?
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LA--->LL
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What is the first electrode called and where is it placed?
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V1 Fourth intercostal space at RIGHT margin of the sternum
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What is the 2nd electrode called and where is it placed?
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V2 Fourth intercostal space at LEFT margin of the sternum
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What is the 3rd electrode called and where is it placed?
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V3 Midway between positions 2 and 4
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What is the 4th electrode called and where is it placed?
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V4 Fifth intercostal space at junction of left midclavicular line
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What is the 5th electrode called and where is it placed?
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V5 At horizontal level ofposition 4 at left anterior axillary line
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What is the 6th electrode called and where is it placed?
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V6 At horizontal level ofposition 4 at left midaxillary line
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What is the difference between a three-channel and a single-channel electrocardiogram?
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Three-channel machine can record the electrical activity of the heart through 3 leads simultaneously, while a sinlge channel machine can record only one lead at a time.
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At what speed does the paper move while recording a normal electrocardiogram?
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25 mm/sec
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What is the purpose of teletransmission
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Can transmit a recording performed at the medical office electronically (by telefax, modem, Ethernet, or wirelessly) to an ECG data interpretation site. The cardiologist can interpret and transmit to sending office same day.
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What is the purpose of interpretive capability?
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Has a built-in computer program that analyzes the recording as it is being run, providing immediate info on heart's activity, leading to earlier diagnosis and treatment.
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What is the purpose of EMR connectivity?
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Allows a digital image of the recording to be sent from the machine to the computer and displayed. Software also analyzes and displays info and reason for interpretation. After physician interprests, can be stored as part of patient's file.
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Why should artifacts be eliminated if they occur in an ECG recording?
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The presence of artifacts affects the quality of the recording, making it difficult to manually measure the ECG cycles. They can sometimes cause a false positive result on an ECG anlayzed by a computer.
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What is the funtction of an artifact filter?
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To reduce artifacts when all else fails.
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List 4 possible causes of muscle artifacts
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1. An apprehensive patient
2. Patient discomfort 3. Patient movement 4. Physical condition, such as Parkison's |
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List 4 possible causes of wandering baseline.
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1. Loose electrodes
2. Dried-out electrolyte 3. Body creams, oils, or lotions 4. Excessive movement of the chest wall during respiration |
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List 4 possible causes of 60-cycle interference artifacts.
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1. Lead wires not following body contour
2. Other electrical equipment in the room 3. Wiring in the walls, ceiling, or floors 4. Improper grounding of the electrocardiograph |
