User`s guide

PageWriter 200/300pi M1771A/1770A Cardiograph Glossary-1
Glossary
AC filter: A filter that screens out ECG artifact caused by power line inter-
ference. This filter is built into the cardiograph and cannot be disabled.
AC line interference: electrical signals originating from the alternating cur-
rent carried by power cords or other electrical equipment. AC line interfer-
ence may obscure important details of the ECG trace.
adult criteria: Interpretive rules used when analyzing ECGs of persons aged
16 years or older.
AHA leads: ECG lead names and identifying colors recommended by the
American Heart Association. Limb leads are labelled RA, LA, LL, RL. Chest
leads are labelled V1-V6. (See IEC leads)
alphanumeric: Composed of both letters and numbers. The PageWriter
300pi cardiographs have an alphanumeric keyboard.
alternating current (AC): Electrical current provided by wall outlets. AC
may be either 60 or 50 Hz depending on country.
analysis criteria: Rules used to interpret ECGs.
artifact: ECG waveform distortion that may diminish ECG quality. ECG
artifact (or noise) may be caused by electrical interference, poor electrode
connections, or patient movement.
artifact filter: Term for filter which screens out noise on the ECG caused by
muscle tremor.
Auto ECG: Twelve-lead ECG which shows 10 seconds of heart activity and
is printed in a preselected format.
baseline wander: A slow upward or downward motion on the baseline of
any ECG waveform.
baseline wander filter: Term for the configurable filter which reduces base-
line wander.