CRAT EXAM QUESTIONS AND ANSWERS
EXAM SCRIPT 2026 TESTED QUESTIONS
WITH COMPLETE SOLUTIONS
⩥ Digital Monitoring. Answer: Transmitted over a computer where
report is verified by a licensed practitioner
⩥ Telemedicine monitoring is usually used to evaluate_____________.
Answer: Artificial Pacemaker Functioning
⩥ Ambulatory Monitor. 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). Answer: Educate
patient, equipment gathered and prepared, electrodes placed on chest,
equipment hooked up
⩥ Procedure for removing. 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. 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. Answer: # most common are speed, gain,
artifact filter.
also have these controls: LCD display, heart rate limits, standardization,
and lead section
⩥ Speed control. 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. 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. 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
⩥ 3 most common causes of artifact are:. Answer: Somatic tremor,
wandering baseline, and AC interference
⩥ History of ECG. Answer: 1903-Wilhelm Einthoven
⩥ ECG graph paper. Answer: Boxes are 5mm by 5mm and indicate .04
seconds in time horizontally and .1 mV in voltage vertically
⩥ How many seconds are between 3 tick marks on top of ecg paper?.
Answer: 6 seconds
⩥ EGC PAPER provides measurement for both______. Answer: time
and voltage.
smallest box =.04 second in time and 1mm or .1mV in voltage
2 large boxes =10mm, which equals 1cm for vertical measurement.
EXAM SCRIPT 2026 TESTED QUESTIONS
WITH COMPLETE SOLUTIONS
⩥ Digital Monitoring. Answer: Transmitted over a computer where
report is verified by a licensed practitioner
⩥ Telemedicine monitoring is usually used to evaluate_____________.
Answer: Artificial Pacemaker Functioning
⩥ Ambulatory Monitor. 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). Answer: Educate
patient, equipment gathered and prepared, electrodes placed on chest,
equipment hooked up
⩥ Procedure for removing. 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. 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. Answer: # most common are speed, gain,
artifact filter.
also have these controls: LCD display, heart rate limits, standardization,
and lead section
⩥ Speed control. 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. 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. 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
⩥ 3 most common causes of artifact are:. Answer: Somatic tremor,
wandering baseline, and AC interference
⩥ History of ECG. Answer: 1903-Wilhelm Einthoven
⩥ ECG graph paper. Answer: Boxes are 5mm by 5mm and indicate .04
seconds in time horizontally and .1 mV in voltage vertically
⩥ How many seconds are between 3 tick marks on top of ecg paper?.
Answer: 6 seconds
⩥ EGC PAPER provides measurement for both______. Answer: time
and voltage.
smallest box =.04 second in time and 1mm or .1mV in voltage
2 large boxes =10mm, which equals 1cm for vertical measurement.
