The heart rate of a well-trained athlete may be reduced to less than 60 beats per minute even though resting cardiac output remains relatively unchanged. This is possible due to

Anurse is caring for a client who has nicotine use disorder and asks about taking varenicline. the nurse should identify that which of the following conditions is a contraindication for this medication? a. rheumatoid arthritis b. copd c. anorexia nervosa d. major depressive disorder