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14 Cards in this Set
- Front
- Back
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ECGs provide information about time and voltage of electrical events in the heart. TRUE/FALSE
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TRUE.
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Each small box within a big box is measured how?
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It is 1mm in height and 1mm in length.
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Each large box has how many small boxes?
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25 small boxes.
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What is the significance between height and width of these boxes?
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Height indicates voltage on the vertical axis, measured in mm or mv.
Width indicates time on the horizontal axis measured in seconds. |
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Each small box on a horizontal line is equal to_____ seconds?
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0.04 seconds(or 40 milliseconds)
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How many small boxes will equal a large box?
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5small boxes equal 1 large box.
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One large box measured horizontally equals how many seconds and milliseconds?
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0.20 seconds/200 ms
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Five large boxes equal how many second(s)?
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1 second
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The time duration of each wave of the ECG can be measured how?
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By counting the small boxes within a wave on the horizontal line.
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What are tics or hatch marks?
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Second markers can appear on ECG paper as vertical lines, triangles or dots. These are tics or hatch marks. They can appear every 1,3or 6 seconds.
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The marker occurring after every 5th large box indicates a 1 second interval,(1 marker per second), a marker after every 15th large box indicates a 6 second interval. TRUE/FALSE
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TRUE.
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The height or depth of a wave represents a measure of_________.
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Voltage. Voltage is measured either upward or downward from the isoelectric line.
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Each small vertical box is equal to 0.1mV. Therefore 10 small vertical boxes or two large vertical boxes equal______.
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1 mV.
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In cardiac hypertrophy, voltage will be increased. TRUE/FALSE
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TRUE.
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