Essentials of Pharmacology for Health Professions 7th Edition by Ruth Woodrow,Bruce Colbert ,David Smith

Exercise 15

Isaac Doniego, a 77-year-old widower with heart failure, has been treated successfully with a combination of ACE inhibitors and diuretics. However, his symptoms worsen and became life threatening despite pharmacologic treatment, so he is hospitalized for evaluation and stabilization on a cardiac glycoside. How will the cardiac glycoside act to lessen Isaac's heart failure
A) By increasing his heart rate
B) By increasing the force of cardiac contraction
C) By increasing his oxygen utilization
D) By suppressing possible cardiac arrhythmias