14. Which of the following patients would diltiazem not be recommended for rate controlling atrial fibrillation?

A. A 55 year old male with hypertrophic cardiomyopathy

B. A 78 year old female with uncontrolled atrial fibrillation despite digoxin and beta-blockers

C. A 58 year old male with end-stage renal disease on hemodialysis

D. A 35 year male with a dilated cardiomyopathy and an ejection fraction of 15%