ECG Exam UPDATED Exam Questions and
CORRECT Answers
Autonomic nervous system - CORRECT ANSWER - "fight or flight" - releases
epinephrine, increased HR, BP, CO
Parasympathetic nervous system - CORRECT ANSWER - "rest and digest" - releases
acetylcholine, decreased HR, CO, and BP, stimulates vagal nerve
Automaticity - CORRECT ANSWER - Cell ability to spontaneously generate impulses
Excitability - CORRECT ANSWER - Cell ability to respond to an impulse
Conductivity - CORRECT ANSWER - Cell ability to transmit an impulse
P wave represents - CORRECT ANSWER - Atrial depolarization (contraction)
PR interval - CORRECT ANSWER - Delay of AV node to allow filling of ventricles
QRS complex - CORRECT ANSWER - Ventricular depolarization (contraction) and
atrial repolarization
T wave - CORRECT ANSWER - Ventricular repolarization
SA node impulse rate - CORRECT ANSWER - 60-100 bpm
AV node - CORRECT ANSWER - 40-60 bpm
, Ventricular impulse rate - CORRECT ANSWER - 20-40 bpm
During absolute refractory period - CORRECT ANSWER - Nothing will happen even if
electrical activity is thrown
During relative refractory period - CORRECT ANSWER - If electrical activity is thrown
during this period (P wave), it could cause vfib or vtach
Isoelectric line - CORRECT ANSWER - The baseline of the ECG
ST segment elevation - CORRECT ANSWER - If ST segment is above isoelectric line -
indicates STEMI
Inverted T wave indicates - CORRECT ANSWER - ischemia to myocardium
1 box on ECG paper represents - CORRECT ANSWER - 0.04 seconds
Determining regularity - CORRECT ANSWER - Is the R to R space consistent
Determining rate - CORRECT ANSWER - Number of QRS complexes between 2 sets of
hashmarks
P wave should be - CORRECT ANSWER - PUP (present, upright, preceding each QRS)
PR interval should be - CORRECT ANSWER - 0.12-0.20 seconds (beginning of P wave
to beginning of QRS)
QRS duration should be - CORRECT ANSWER - <0.12 (beginning of QRS to end of
QRS)
CORRECT Answers
Autonomic nervous system - CORRECT ANSWER - "fight or flight" - releases
epinephrine, increased HR, BP, CO
Parasympathetic nervous system - CORRECT ANSWER - "rest and digest" - releases
acetylcholine, decreased HR, CO, and BP, stimulates vagal nerve
Automaticity - CORRECT ANSWER - Cell ability to spontaneously generate impulses
Excitability - CORRECT ANSWER - Cell ability to respond to an impulse
Conductivity - CORRECT ANSWER - Cell ability to transmit an impulse
P wave represents - CORRECT ANSWER - Atrial depolarization (contraction)
PR interval - CORRECT ANSWER - Delay of AV node to allow filling of ventricles
QRS complex - CORRECT ANSWER - Ventricular depolarization (contraction) and
atrial repolarization
T wave - CORRECT ANSWER - Ventricular repolarization
SA node impulse rate - CORRECT ANSWER - 60-100 bpm
AV node - CORRECT ANSWER - 40-60 bpm
, Ventricular impulse rate - CORRECT ANSWER - 20-40 bpm
During absolute refractory period - CORRECT ANSWER - Nothing will happen even if
electrical activity is thrown
During relative refractory period - CORRECT ANSWER - If electrical activity is thrown
during this period (P wave), it could cause vfib or vtach
Isoelectric line - CORRECT ANSWER - The baseline of the ECG
ST segment elevation - CORRECT ANSWER - If ST segment is above isoelectric line -
indicates STEMI
Inverted T wave indicates - CORRECT ANSWER - ischemia to myocardium
1 box on ECG paper represents - CORRECT ANSWER - 0.04 seconds
Determining regularity - CORRECT ANSWER - Is the R to R space consistent
Determining rate - CORRECT ANSWER - Number of QRS complexes between 2 sets of
hashmarks
P wave should be - CORRECT ANSWER - PUP (present, upright, preceding each QRS)
PR interval should be - CORRECT ANSWER - 0.12-0.20 seconds (beginning of P wave
to beginning of QRS)
QRS duration should be - CORRECT ANSWER - <0.12 (beginning of QRS to end of
QRS)
