CRAT Review UPDATED ACTUAL Exam
Questions and CORRECT Answers
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
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
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
3 most common causes of artifact are: - CORRECT ANSWER Somatic tremor, wandering
baseline, and AC interference
History of ECG - CORRECT ANSWER 1903-Wilhelm Einthoven
ECG graph paper - CORRECT 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? - CORRECT ANSWER 6
seconds
Questions and CORRECT Answers
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
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
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
3 most common causes of artifact are: - CORRECT ANSWER Somatic tremor, wandering
baseline, and AC interference
History of ECG - CORRECT ANSWER 1903-Wilhelm Einthoven
ECG graph paper - CORRECT 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? - CORRECT ANSWER 6
seconds
