SSM Basic Dysrhythmia
Review Exam Questions and
Answers
Systole - Correct Answers: Phase of contraction when blood is ejected
Diastole - Correct Answers: Phase of relaxation or filling
Conduction System - Correct Answers:
Inherent Rate of SA node - Correct Answers: 60-100 beats per minute
Inherent Rate of AV node - Correct Answers: 40-60 beats per minute
AV node acts as a "gate keeper" for ventricles
Inherent Rate of Bundle of His - Correct Answers: 40-60 beats per minute
Inherent Rate of Ventricles - Correct Answers: 20-40 beats per minute
Sympathetic Nervous System - Correct Answers: Affects atria & ventricle, increases SA node rate, speed
of conduction, and force of contraction
Parasympathetic Nervous System - Correct Answers: Affects the atria, decreases the HR, decreases the
speed of conduction, decreases for of contraction
Depolarization - Correct Answers: Cells receive a stimulus, changes in electrical charges occur resulting in
a electrical flow which spreads in a wavelike motion resulting in contraction - systole
Repolarization - Correct Answers: Return of the electrical charge to their original postion, recovery state
, Absolute Refractory - Correct Answers: Portion of the cardiac cycle where NO stimulus, no matter how
strong, can excite the cardiac tissue
Relative Refractory - Correct Answers: Portion of cardiac cycle when all cells are not fully repolarized, a
strong enough stimulus can excite the cardiac tissue, also referred to as the vulnerable period
Positive Deflection - Correct Answers: Current flowing toward a + electrode gives a + deflection (above
baseline)
Negative Deflection - Correct Answers: Current flowing away from a + electrode gives a - deflections
(below baseline)
P wave - Correct Answers: Reflects atrial depolarization
PR interval - Correct Answers: Represents the interval from the time the impulse leaves the SA node, the
delay at the AV node.
QRS - Correct Answers: Represents ventricular depolarization. The time required for the impulse to
travel through R & L ventricles
Normal PR interval - Correct Answers: 0.12-0.20 seconds
Normal QRS - Correct Answers: 0.04 -.10 or <0.12
T wave - Correct Answers: Represents ventricular repolarization
QT interval - Correct Answers: Represents total ventricular activity (depolarization to repolarization)
ST segment - Correct Answers: Represents time between completion of ventricular depolarization and
beginning or repolariation
Review Exam Questions and
Answers
Systole - Correct Answers: Phase of contraction when blood is ejected
Diastole - Correct Answers: Phase of relaxation or filling
Conduction System - Correct Answers:
Inherent Rate of SA node - Correct Answers: 60-100 beats per minute
Inherent Rate of AV node - Correct Answers: 40-60 beats per minute
AV node acts as a "gate keeper" for ventricles
Inherent Rate of Bundle of His - Correct Answers: 40-60 beats per minute
Inherent Rate of Ventricles - Correct Answers: 20-40 beats per minute
Sympathetic Nervous System - Correct Answers: Affects atria & ventricle, increases SA node rate, speed
of conduction, and force of contraction
Parasympathetic Nervous System - Correct Answers: Affects the atria, decreases the HR, decreases the
speed of conduction, decreases for of contraction
Depolarization - Correct Answers: Cells receive a stimulus, changes in electrical charges occur resulting in
a electrical flow which spreads in a wavelike motion resulting in contraction - systole
Repolarization - Correct Answers: Return of the electrical charge to their original postion, recovery state
, Absolute Refractory - Correct Answers: Portion of the cardiac cycle where NO stimulus, no matter how
strong, can excite the cardiac tissue
Relative Refractory - Correct Answers: Portion of cardiac cycle when all cells are not fully repolarized, a
strong enough stimulus can excite the cardiac tissue, also referred to as the vulnerable period
Positive Deflection - Correct Answers: Current flowing toward a + electrode gives a + deflection (above
baseline)
Negative Deflection - Correct Answers: Current flowing away from a + electrode gives a - deflections
(below baseline)
P wave - Correct Answers: Reflects atrial depolarization
PR interval - Correct Answers: Represents the interval from the time the impulse leaves the SA node, the
delay at the AV node.
QRS - Correct Answers: Represents ventricular depolarization. The time required for the impulse to
travel through R & L ventricles
Normal PR interval - Correct Answers: 0.12-0.20 seconds
Normal QRS - Correct Answers: 0.04 -.10 or <0.12
T wave - Correct Answers: Represents ventricular repolarization
QT interval - Correct Answers: Represents total ventricular activity (depolarization to repolarization)
ST segment - Correct Answers: Represents time between completion of ventricular depolarization and
beginning or repolariation
