CRAT Review Exam Questions and
Answers (Latest update 2025)
Transtelephonic Monitoring - Correct Answer ✅ Transmitted
over phone to a LICENSED practitioner to read (magnetic
tape), Patients use up to 30 days
Digital Monitoring - Correct Answer ✅ Transmitted over a
computer where report is verified by a licensed practitioner
Telemedicine monitoring is usually used to
evaluate_____________ - Correct Answer ✅ Artificial
Pacemaker Functioning
Ambulatory Monitor - Correct Answer ✅ Most common type
is holter monitor (continuous or intermittent-only records
when patient has symptoms. Used for dysrhythmias,
evaluation cardic meds, and checking pacemakers-24-48 hrs-
up to 30 days
Procedure for applying ambulatory monitor (holter) - Correct
Answer ✅ Educate patient, equipment gathered and
prepared, electrodes placed on chest, equipment hooked up
,CRAT Review Exam Questions and
Answers (Latest update 2025)
Procedure for removing - Correct Answer ✅ before
removing, diary must be complete by patient, then turn off
recording, remove electrodes, clean skin, report results
*process is based on type of equipment uses
Functions of common ECG machine - Correct Answer ✅ 3
basic functions are input, signal processing, output display.
Sensors in ECG machine serve as receiving devices for the
electrical activity of the heart.
INPUT-Electrode placed on patients skin direct impulses to
ECG instrument, providing the input. Signal processing
happens in ECG machine, output display is the result of
processing and is shown on screen (known as oscilloscope)
and/or on ECG tracings. Electronic output is quickly becoming
most common choice for ECG tracings.
ECG machine controls - Correct Answer ✅ # most common
are speed, gain, artifact filter.
also have these controls: LCD display, heart rate limits,
standardization, and lead section
, CRAT Review Exam Questions and
Answers (Latest update 2025)
Speed control - Correct Answer ✅ regulates how fast or
slow the paper or data run during procedure. MOST
COMMONLY USED: 25 mm/sec
*increasing the speed for example to 50mm/sec will make
wave forms appear wider and is useful if patient heart rate is
very fast. if you change the speed you must note on tracing
by circling the setting on tracing and notify the healthcare
provider
*speed in measure on a horizontial axis
Gain - Correct Answer ✅ control on ECG machine that
increases or decreases size of ECG tracing. Normal setting is
10mm/mV. 20mm/V will double size and 5mm/V will reduce
size by half
* NEED TO KNOW mV is a millivolt-unit of measurement to
indicate voltage- Voltage is measures on a vertical axis
Artifact Filter - Correct Answer ✅ unwanted marks on ECG
tracing caused by something other than heart activity
*Normal settings is between 40-150Hz, 40 Hz can be used to
reduce artifact
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