The nurse has reviewed information about the cardiovascular system before caring for a client with heart disease.The nurse knows that which of the following statements is true concerning the physiology of the cardiovascular system?
A) Stimulating the parasympathetic system would cause the heart rate to go up.
B) When a person has heart muscle disease,the heart muscles stretches as far as is necessary to maintain function.
C) The QRS interval on the electrocardiogram represents the electrical impulses passing through the ventricles.
D) When stroke volume decreases,there is a resultant decrease in heart rate.

Question

Quizplus · Accepted Answer

The QRS complex indicates that the electrical impulse has traveled through the ventricles.Stimulating the parasympathetic system would cause the heart rate to decrease,not increase.In the diseased heart,the stretch of the myocardium is beyond the heart's physiological limits.When stroke volume is decreased,there is an increase in heart rate.

The Nurse Has Reviewed Information About the Cardiovascular System Before