What nursing action should you take if a patient on a 12 lead ECG wants to
take a shower? - ANS ✓Get an order from the physician to take it off
How do you manually determine heart rate using an ECG strip? - ANS ✓In a
6 second interval, count between R's and multiple by 10
Ex. if there are 8 R-R intervals, the heart rate is 80
In normal sinus rhythm, how should the P wave look? - ANS ✓Upright,
smooth, with no bumps
In normal sinus rhythm, how should the PR interval look? - ANS ✓3-5 little
boxes (between 0.12-0.20 seconds)
In normal sinus rhythm, how should the QRS interval look? - ANS ✓Upright -
less than 3 little boxes (less than 0.12 seconds)
In normal sinus rhythm, how should the ST segment look? - ANS ✓Upright
No ST elevation
Typically around 0.12 seconds but no standard requirement
NSG 411
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NSG
In normal sinus rhythm, how should the T wave look? - ANS ✓Approximately
0.16 seconds (four little boxes)
What is an extra hump after the ST segment called and what does it
represent? - ANS ✓U wave, related to K+
In normal sinus rhythm, how should the QT interval look? - ANS ✓Approx
0.34-0.43 seconds (8-10 little boxes)
What does a flat QT interval represent? - ANS ✓Absence of electrical activity
in the cardiac cells
What 5 things should you look for as a nurse in an ECG? - ANS ✓1. Rhythm -
is R-R, P-P, and Q-Q equal for all rhythms? Is there any ST elevation?
2. Rate - is the rate between 60-100 bpm?
3. P Wave - is there a P wave for every rhythm and is it regular?
4. PR Interval - how long is PR interval? Is it between 3-5 little boxes (0.12-
0.2 seconds)?
5. QRS Complex - How long is QRS complex? Is it upright and less than 3
boxes (0.12 seconds)?
How will sinus bradycardia look on an ECG? - ANS ✓1. Rhythm normal
*2. Rate - less than 60*
3. P Wave - regular
4. PR Interval - between 0.12-2 seconds
5. QRS Complex - upright and less than 0.12 seconds
*Identify by: measuring HR as <60*
What is the first thing you should do when you notice sinus bradycardia? -
ANS ✓Look at the meds - most common cause of bradycardia
NSG 411
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