Digitalis and other cardiac glycosides increase the mechanical pumping

Digitalis and other cardiac glycosides increase the mechanical pumping ability of the heart by bringing about an increase in _________ concentration.
A)   extracellular potassium
B)   intracellular potassium
C)   extracellular calcium
D)   intracellular calcium
E)   extracellular sodium


The primary cardiac problem in digitalis toxicity is:
A)   decreased coronary blood flow.
B)   increased coronary oxygen demand.
C)   decreased cardiac intracellular sodium concentration.
D)   arrhythmia.
E)   isolated systolic hypotension.


All of the following types of drugs will decrease cardiac workload in people with heart failure EXCEPT:
A)   angiotensin converting enzyme (ACE) inhibitors.
B)   beta blockers.
C)   alpha-1 stimulants.
D)   vasodilators.
E)   diuretics.