NUR 4420: EKG INTERPRETATION QUESTIONS
Electrocardiography: what 3 electrodes does the basic 3 lead system consist of? What
are these 3 leads used to produce? - Answers :1.) right arm (RA)
2.) left arm (LA)
3.) left leg) (LL)
-Leads I, II, and III
Electrocardiography: what ECG system is typically used in critical care? - Answers :5-
lead system
Electrocardiography: what leads does the 5-lead system use? (7) - Answers :1.) Lead I
2.) Lead II
3.) Lead III
4.) aVR
5.) aVL
6.) aVF
7.) at least one chest lead known as the "V" lead
Electrocardiography: what is a bipolar lead system (leads I, II, & III)? - Answers :Each
lead has a positive & negative pole
Electrocardiography: how is the 5 lead EKG placed? - Answers :-White on right
-Snow over grass
-Smoke over fire
-Chocolate is dear to my heart
Nursing Management - Selecting EKG Leads: what does tthe Einthoven triangle
determine? - Answers :Electrical axis of heart
EKG Paper: how many seconds does a small box equate to? - Answers :0.04 seconds
EKG Paper: how many seconds does a large box equate to? - Answers :0.2 seconds
EKG Paper: how many boxes equal 6 seconds? - Answers :30 boxes
Interpreting the EKG: what are the 7 parts of an EKG wave? - Answers :1.) P-wave
2.) PR interval
3.) QRS complex
4.) ST segment
5.) T wave
6.) QT
7.) QTc
, Interpreting the EKG: why is QT important? - Answers :Prolonged QT can predispose
patient to Torsades de Pointes
Interpreting the EKG - QTc: what does the QT interval vary with? How can the QT be
corrected? What should the QTc be in terms of time? What is a quick method for
assessing QT, and when is it prolonged? - Answers :1.) heart rate
2.) can be corrected as if the HR were 60bpm using this formula - square root of
QT/RR=QTc
3.) 0.44 seconds or less
4.) it is usually less than half of the R-R interval
5.) prolonged if it is more than one half of the R-R interval
Interpreting the EKG - Dysrhythmia Interpretation: what is a dysrhythmia? - Answers
:Disturbance of normal conduction
Interpreting the EKG - Dysrhythmia Interpretation: how often do you monitor? What lead
systems are common to monitor dysrhythmias with? - Answers :1.) continuous
2.) 3, 5, 6
Interpreting the EKG - Dysrhythmia Interpretation: how often are EKG strips recorded?
Where are rhythms placed? - Answers :1.) every shift (every 8 hrs) and as changes
occur
2.) database
Heart Rate Determination: what are the 3 ways that you can calculate the HR on an
EKG strip? - Answers :1.) # R-R intervals in 6s x 10
2.) # large boxes between ORS/300
3.) # small boxes between QRS/1500
Interpreting the EKG - Dysrhythmia Interpretation: what 6 things do you want to
evaluate? - Answers :1.) rate
2.) rhythm determination
3.) P wave evaluation
4.) PR interval evaluattion
5.) QRS complex evaluation
6.) QT evaluation
Sinus Rhythms - Normal Sinus Rhythm: what is the rate? What is the rhythm? P-wave?
PR interval time? QRS time? - Answers :Rate: 60-100 beats/min
Rhythm: regular
P-wave: present; 1 per QRS
PR Interval: 0.12-0.20 seconds
QRS: 0.06-0.10 seconds
Sinus Rhythms - SInus Arrythmia: what is the rate? What is the rhythm? P-wave? PR
interval time? QRS time? - Answers :Rate: varibale
Electrocardiography: what 3 electrodes does the basic 3 lead system consist of? What
are these 3 leads used to produce? - Answers :1.) right arm (RA)
2.) left arm (LA)
3.) left leg) (LL)
-Leads I, II, and III
Electrocardiography: what ECG system is typically used in critical care? - Answers :5-
lead system
Electrocardiography: what leads does the 5-lead system use? (7) - Answers :1.) Lead I
2.) Lead II
3.) Lead III
4.) aVR
5.) aVL
6.) aVF
7.) at least one chest lead known as the "V" lead
Electrocardiography: what is a bipolar lead system (leads I, II, & III)? - Answers :Each
lead has a positive & negative pole
Electrocardiography: how is the 5 lead EKG placed? - Answers :-White on right
-Snow over grass
-Smoke over fire
-Chocolate is dear to my heart
Nursing Management - Selecting EKG Leads: what does tthe Einthoven triangle
determine? - Answers :Electrical axis of heart
EKG Paper: how many seconds does a small box equate to? - Answers :0.04 seconds
EKG Paper: how many seconds does a large box equate to? - Answers :0.2 seconds
EKG Paper: how many boxes equal 6 seconds? - Answers :30 boxes
Interpreting the EKG: what are the 7 parts of an EKG wave? - Answers :1.) P-wave
2.) PR interval
3.) QRS complex
4.) ST segment
5.) T wave
6.) QT
7.) QTc
, Interpreting the EKG: why is QT important? - Answers :Prolonged QT can predispose
patient to Torsades de Pointes
Interpreting the EKG - QTc: what does the QT interval vary with? How can the QT be
corrected? What should the QTc be in terms of time? What is a quick method for
assessing QT, and when is it prolonged? - Answers :1.) heart rate
2.) can be corrected as if the HR were 60bpm using this formula - square root of
QT/RR=QTc
3.) 0.44 seconds or less
4.) it is usually less than half of the R-R interval
5.) prolonged if it is more than one half of the R-R interval
Interpreting the EKG - Dysrhythmia Interpretation: what is a dysrhythmia? - Answers
:Disturbance of normal conduction
Interpreting the EKG - Dysrhythmia Interpretation: how often do you monitor? What lead
systems are common to monitor dysrhythmias with? - Answers :1.) continuous
2.) 3, 5, 6
Interpreting the EKG - Dysrhythmia Interpretation: how often are EKG strips recorded?
Where are rhythms placed? - Answers :1.) every shift (every 8 hrs) and as changes
occur
2.) database
Heart Rate Determination: what are the 3 ways that you can calculate the HR on an
EKG strip? - Answers :1.) # R-R intervals in 6s x 10
2.) # large boxes between ORS/300
3.) # small boxes between QRS/1500
Interpreting the EKG - Dysrhythmia Interpretation: what 6 things do you want to
evaluate? - Answers :1.) rate
2.) rhythm determination
3.) P wave evaluation
4.) PR interval evaluattion
5.) QRS complex evaluation
6.) QT evaluation
Sinus Rhythms - Normal Sinus Rhythm: what is the rate? What is the rhythm? P-wave?
PR interval time? QRS time? - Answers :Rate: 60-100 beats/min
Rhythm: regular
P-wave: present; 1 per QRS
PR Interval: 0.12-0.20 seconds
QRS: 0.06-0.10 seconds
Sinus Rhythms - SInus Arrythmia: what is the rate? What is the rhythm? P-wave? PR
interval time? QRS time? - Answers :Rate: varibale
