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Mayo Clinic EKG Review | Questions And Answers Latest {} A+ Graded | 100% Verified
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Mayo Clinic EKG Review | Questions And Answers Latest {} A+ Graded | 100% Verified
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Mayo Clinic EKG Review | Questions And Answers Latest {2024- 2025} A+ Graded | 100%Verified
What is the purpose of ECG? - Measures electrical physiology of the heart, rate/rhythm, and electrical
activity.
The pacemaker site within the ________ generally controls the heart. - Atria
The sympathetic nervous system ___________ heart rate, conduction, and irritability. - INCREASES
The parasympathetic nervous system ___________ heart rate, conduction, and irritability. - DECREASES
PR Interval - 0.12-0.20, 3-5 small boxes
QRS Complex - < 0.12, 3 small boxes
QT Interval - 0.35-0.43
Refractory Period - 2nd half of T wave, where impulses get through
Large Square Method - # of big squares between two R waves, divided into 300
Small Square Method - # of small squares between two R waves, divided into 1500
Sinus Bradycardia - Regular
<60BPM
Uniform P Waves
PR = 0.12-0.20
QRS = <0.12
, Normal Sinus - Regular
60-100 BPM
Uniform P Waves
PR = 0.12-0.20
QRS = <0.12
Sinus Tachycardia - Regular
>100 BPM
Uniform P Waves
PR = 0.12-0.20
QRS = <0.12
Sinus Arrhythmia - Irregular
Roughly 60-100 BPM
PJC - Regular or Irregular
Rate depends on preexisting rhythm
Inverted or hidden P waves
QRS = <0.12/may look slightly different than rest
Junctional Tachycardia - Regular
100-180 BPM
Hidden, inverted P wave
PR = <0.12
QRS = <0.12/Normal
SVT/Atrial Tachycardia - Regular R-R intervals
Rate 150-210 BPM
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