❤️ Cardio: EKG's Flashcards
Cardio: EKG’s
P-Wave = ______ depolarization.
Normal is ______ sec
Atrial depolarization
0.8 - 0.1 sec
2 small squares
Cardio: EKG’s
PR Interval = represents ______________________
Normal is ______ sec
Atrial kick
0.12 - 0.2 sec
less than one large square
Cardio: EKG’s
ST Segment – beginning of ventricular ___________
– Normal at ____________ line
repolarization
isometric
Cardio: EKG’s
12 lead EKG is used for _________
5 lead EKG is used for _________
12 = diagnostic 5 = monitoring
Cardio: EKG’s
Large Boxes = ____ seconds in time
0.2
Cardio: EKG’s
Small boxes = ____ seconds in time
0.04
Cardio: EKG’s
The HR “Countdown Method” on EKG
300-150-100-75-60-50-43-37-33-30
Cardio: EKG’s
Rhythms that Originate in the SA Node, Atria, or AV Node are called…
Supraventricular Rhythms
Cardio: EKG’s
Normal Sinus Rhythm is between
60 - 100 bpm
Cardio: EKG’s
key feature to distinguish a sinus arrhythmia in an EKG?
R - R interval varies
All p-waves are identical
HR between 60-100
-
Sinus Pause/Sinus Arrest. Named w/ underlying rhythm
- ex: NSR with sinus pause OR Sinus Bradycardia with a pause.
- R-R interval is regular, but occasional pauses noted
Cardio: EKG’s
Premature Atrial Contraction (PAC) originate from
irritable, sometimes ischemia areas
Cardio: EKG’s
key feature to distinguish a premature atrial contraction
P wave of early beat may get buried in T wave of prior complex
P wave is often shaped abnormally
Cardio: EKG’s
“sawtooth flutter waves” and QRS complex: 2, 3, 4 or more flutter waves for each QRS
Atrial Flutter
Cardio: EKG’s
Treatment of atrial flutter
- Call RN, NP, MD, PA
- Rhythm Conversion (cardioversion) if patient doesn’t come out of this rhythm
- B blocker, digoxin, verapamil
- Not life-threatening unless it goes to other rhythms