The nurse understands that under normal circumstances digoxin exerts which of the following effects?
a. ? chronotropic; ? dromotropic; ? inotropic
b. ? chronotropic; ? dromotropic; ? inotropic
c. ? chronotropic; ? dromotropic; ? inotropic
d. ? chronotropic; ? dromotropic; ? inotropic
ANS: B
Feedback
A Incorrect: Digoxin slows and strengthens the heart rate.
B Correct: Digoxin slows heart rate (negative chronotropic) and impulse conduction (negative dromotropic) and strengthens contractility (positive inotropic) of the heart.
C Incorrect: Digoxin slows and strengthens the heart rate.
D Incorrect: Digoxin slows (not increases) and strengthens the heart rate.
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