Contraction of the ventricles is referred to as ventricular
A. systole.
B. diastole.
C. fibrillation.
D. ischemia.
E. depolarization.
(
Question 2) What cardiac arrhythmia will have no QRS complex as a symptom?
A. atrial fibrillation
B. ventricular fibrillation
C. bradycardia
D. premature ventricular contractions
(
Question 3) Variations in respiratory rate is a symptom of
A. sinus arrhythmia.
B. ventricular tachycardia.
C. SA node block.
D. paroxysmal atrial tachycardia
(
Question 4) What event(s) occur during the QRS complex of an ECG?
A. depolarization of the atria
B. repolarization of the ventricles
C. depolarization of the atria and repolarization of the ventricles
D. depolarization of the ventricles and repolarization of the atria
(
Question 5) What abnormal heart rhythm could be caused by an elevated body temperature, excessive sympathetic stimulation, or toxic conditions?
A. bradycardia
B. atrial fibrillation
C. second-degree AV node block
D. tachycardia
(
Question 6) The period of time in which the myocardium is insensitive to further stimulation is called the
A. absolute refractory period.
B. hyperpolarization period.
C. AV period.
D. SA period.
E. ectopic focus.
(
Question 7) Of the types of damage resulting from a myocardial infarction, which is most likely to cause the greatest increase in the Q-T interval?
A. infarction in the AV node
B. left bundle branch block
C. infarction affecting the SA node
D. tachycardia
E. ectopic focus
(
Question 8) The P wave of an ECG indicates
A. atrial depolarization.
B. atrial repolarization.
C. ventricular depolarization.
D. ventricular repolarization.
E. threshold.
(
Question 9) If cardiac muscle cells are unable to repolarize, this would cause
A. cardiac output to increase.
B. no harm. These cells can spontaneously depolarize anyway.
C. the heart rate to decrease. It might cause cardiac arrest.
D. an increased demand on mitochondria to produce more ATP.
E. tachycardia.
(
Question 10) In a normal electrocardiogram, the
A. P wave results from repolarization of the atria.
B. QRS complex results from ventricular depolarization.
C. P wave occurs after the QRS complex but before the T wave.
D. T wave represents depolarization of the atria.
E. repolarization of the atria is clearly visible.
Quick Reply
