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Mayo Clinic EKG Review |Questions & Answers Verified 100% Correct
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Mayo Clinic EKG Review |Questions & Answers Verified 100% Correct
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Mayo Clinic EKG Review |Questions & AnswersVerified 100% Correct
Can you have mechanical activity without electrical activity? - ✔✔No
Can you have electrical activity without mechanical activity? - ✔✔YES (PEA)
What are the three pacemaker sites? - ✔✔SA
AV
Purkinje Fibers
Normal/Inherent rates of pacemaker sites? - ✔✔SA: 60-100
AV: 40-60
Purkinje: 20-40
If you see a P wave on an ECG, does this mean that the atria contracted? - ✔✔No
Normal PRI? - ✔✔0.12-0.20
Normal QRS? - ✔✔<0.12
Normal QT? - ✔✔0.35-0.43
What does a P wave represent? - ✔✔Atrial depolarization
What pacemaker sites can produce P waves? - ✔✔SA and AV
, What does a prolonged PRI indicate? - ✔✔Heart Block
What does the QRS complex represent? - ✔✔Ventricular depolarization
What two parts of an ECG represent ventricular repolarization? - ✔✔ST segment
T wave
Where do sinus rhythms originate from? - ✔✔AV
What part of the autonomic nervous system is responsible for sinus tach> - ✔✔Sympathetic
What makes up the AV junction? - ✔✔AV node, bundle of HIS, tissue
What is the purpose of the AV junction? - ✔✔Delays impulse for the atrial kick/first line of
backup
Normal rate for AV junction? - ✔✔40-60
What is unique about the P wave in junctional rhythms? - ✔✔Short PRI
Hidden P wave
Retrograde P wave after QRS
PRI in junctional rhythms? - ✔✔<0.12
Width of QRS in junctional rhythms? - ✔✔<0.12
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