ecg – review part 2

Unlock all answers in this set

Unlock answers
question
what is oscilloscope
answer
results of the tracing they are usually on printed report. can be on this screen
question
What speed does the paper run on an ECG?
answer
most common 25mm/ per second
question
What should you do if you adjust speed on ECG
answer
you must indicate on ECG tracing
question
What is gain pertaining to ECG
answer
regulates the output or height of the waveform can be doubled or reduced increases size of whole ECG
question
What is an artifact filter used for
answer
used to reduce artifact It corrects only the printed output
question
artifact filter normal setting
answer
40hz & 150 HZ
question
What is a stylus
answer
On older machines are heated, and the paper is treated so when the heated stylus moves it generates a tracing
question
What is a normal gain on an ECG
answer
10mm/ mv
question
What is the input function of the ECG
answer
electrodes provide input
question
What is the Signal processing function of the ECG
answer
occurs inside machine, it amplifies the electrical impulse and converts it into a mechanical action
question
What is the Output display function of the ECG
answer
results of the tracing they are usually on a printed report. Can be on a screen known as an Oscilloscope
question
The stylus goes up ____ small squares and remain there for ____small squares (when using standard amount of current)
answer
10 small squares and remain there for 2 small squares
question
Measurements on ECG - Horizontal represents
answer
Measurements on ECG- represents time
question
Measurements on ECG- Heavy lines are
answer
Measurements on ECG- are 5mm by 5mm
question
Measurements on ECG- Smaller box represents
answer
Measurements on ECG- 0.04 seconds in time and 1mV in voltage
question
Measurements on ECG- At normal speed, 1 sec. equals
answer
25mm or 5 heavy lines
question
Measurements on ECG- Vertical represents
answer
Measurements on ECG- represents voltage
question
ECG machines are calibrated so that
answer
1cm. =1 mV
question
ECG graph paper - Provides _____ for measurement.
answer
ECG graph paper - increments
question
ECG graph paper is ______ and _______ sensitive
answer
Pressure and heat sensitive
question
what are the two types of ECG graph paper
answer
standard grid & dot matrix
question
what will erase the tracings on ECG graph paper
answer
Alcohol, plastic, X-ray film and sunlight
question
What is advantages and disadvantages of dot matrix
answer
Dot matrix more expensive but takes less ink easier to read photocopies sharper
question
Electrodes used more commonly and why ?
answer
Disposable - Gel is already applied and also reduces the chance of cross contamination
question
two types of Reusable Electrode
answer
plates and bulbs
question
Reusable Electrode must use the same amount of what for each electrode? Why?
answer
conductive materials, or will get a poor reading
question
Reusable Electrode what care is needed
answer
must be properly washed be checked regularly for corrosion
question
_________refers to the action of making sure that the machine is working correctly & that it is done using a standard amount of current.
answer
Standardization
question
New machines do this automatically. In older machines there is a button you can press to
answer
restandardize the machine
question
place chest leads by
answer
counting down the correct number of intercostals spaces, -feel the clavicle next to the suprasternal notch count down
question
What is Lead selector used for
answer
used to run each lead individually
question
Location of chest leads & color for - V1
answer
4th ICS R of sternum- red
question
Location of chest leads & color for - V2
answer
4th ICS L of sternum - yellow
question
Location of chest leads & color for - V3
answer
midway between V2 and V4 -green
question
Location of chest leads & color for - V4
answer
midclavicular line 5th ICS - blue
question
Location of chest leads & color for - V5
answer
midway between V4 and V6 horizontal to V4 - orange
question
Location of chest leads & color for - V6
answer
midaxillary line horizontal to V4 - purple
question
What to remember when applying electrodes about skin ?
answer
Skin must be clean and dry. -Use alcohol to clean skin prn, -may have to shave small areas if hairy, allow to dry completely
question
What to remember when applying electrodes about placement ?
answer
Place on non-bony areas
question
What to remember when applying electrodes to legs
answer
above ankles tab facing upwards
question
What to remember when applying electrodes to arms
answer
use fleshy parts tabs facing downwards
question
Apply precordial leads tabs facing
answer
tabs facing downwards
question
If using disposable leads remember to
answer
remove the paper backing and press firmly into position
question
If you run an ECG machine @ 25mm/sec. in 1 minute it will create a strip with
answer
a strip with 300 large boxes
question
How do you calculate heart rate
answer
Count the number of large boxes between 2 R waves divide by 300 Example: 5 large boxes between 2 R waves 300/5 = 60
question
How do you calculate heart rate using the 6 second method
answer
Identify 6 second section of tracing (ECG tracing marked @ 3 second intervals) View 2 sections (30 boxes) Count the number of complete complexes (P,Q,R,S,T waves) Only count if fully complete Multiply by 10
question
When is 6 second method most often used
answer
for irregular rhythms
question
Location of Limb Leads color - RA
answer
right arm white (clouds) ***When all is right -clouds over grass ground*****
question
Location of Limb Leads color - RL
answer
right leg - This is also grounded lead green (grass) (Ground ) ***When all is right- clouds over grass ground*****
question
Location of Limb Leads color - LA
answer
Left Arm black (smoke) ******smoke over fire*****
question
Location of Limb Leads color - LL
answer
Left Leg Red (fire) ******smoke over fire*****
question
small box on ECG represents how many seconds
answer
.04 seconds
question
large box on ECG represents how many seconds
answer
0.2 seconds
question
PR Interval is how many seconds
answer
0.12 - 0.20 sec
question
QRS Duration is how many Seconds
answer
0.08 -0.10 sec
question
QT Interval is how many seconds
answer
0.4- 0.43 sec
question
RR Interval is how many seconds
answer
0.6 - 1.0 sec
question
Sequence Method also known as 300 method how does it work
answer
Find R wave closest to a line count each line after till next R wave - if next R wave not on line -go to first line after Each Line represents a number Sequence order: 300 150 100 75 60 50 look at the number of last line this is heart rate (you can estimate if R wave not on line.) ***does not work on irregular rhythms***
question
1500 hundred method
answer
Count number of small boxes either Between P & P interval - for atrial rate or Between R & R interval - for ventricular rate ~ divide 1500 by number of small boxes = heart rate ** used for precise measurement / fast rhythms**
Get an explanation on any task
Get unstuck with the help of our AI assistant in seconds
New