EKG TESTING Flashcards

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1
Q

electrocardiogram (EKG)

A

a visual picture of the electrical activity of the heart created by placing electrodes on the body.

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2
Q

depolarization

A

occurs when the heart muscle contracts.

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3
Q

repolarization

A

occurs when the heart muscle relaxes

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4
Q

stylus

A

the heated instrument on the EKG machine that burns the recording into the heat-sensitive paper

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5
Q

electrodes

A

devices attached to the arms, legs, and chest that sense electrical impulses.

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6
Q

leads

A

the wires that transmit the signals for the EKG recording from the various electrode locations on the arms, legs, and chest.

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7
Q

standard

A

the mark that appears at the beginning or end of an EKG tracing that is a universal signal of the speed and sensitivity of the tracing.

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8
Q

unipolar

A

electrical conduction that comes from one specific location and travels in only one direction

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9
Q

bipolar

A

electrical conduction that occurs between two poles and travels in both directions between the poles

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10
Q

augmented

A

enhanced

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11
Q

artifacts

A

unwanted disturbances that can interfere with accurate interpretation of an EKG tracing

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12
Q

somatic tremor

A

body movements that cause an EKG tracing artifact; such as shivering, coughing, sneezing, talking, and moving

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13
Q

alternating current (AC) interference

A

caused by improper grounding or by a machine that is not equipped to filter out extraneous electrical currents

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14
Q

wandering baseline

A

also known as a baseline drift; in this artifact the baseline wanders up and down on the EKG paper, interfering with accurate recording.

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15
Q

interrupted baseline

A

a related artifact that may be seen as a sharp break in the tracing

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16
Q
A