In 2000 Harjai, et al. showed that, of patients who received in hospital care by cardiologists, men were more likely to receive combination therapy. However, of patients who saw non-cardiac specialists, women were more likely to receive Digoxin and combination therapy. 
As with ACE-inhibitor efficacy, prescription rates also show conflicting results:
One study showed that women suffer from more adverse effects when treated with ACE-inhibitors than men 
It is important to note that overall, ACE-Inhibitors are under prescribed to both genders 
One major study showed that 32% of patients were discharged from hospital without an ACE inhibitor prescription 
These patients have a 14% greater risk of dying within a year than those who have been properly treated with the drug.
18. Opasich C, Tavazzi L, Lucci D, Gorini M, Albanese M, Cacciatore G, Maggioni A.Comparison of one-year outcome in women versus men with chronic congestive heart failure. Am J Cardiol 2000;86:353 –7.
24. Galvao M, Kalman J, DeMarco T, Fonarow GC, Galvin C, Ghali JK, Moskowitz RM, on behalf of the ADHERE scientific advisory committee, investigators, coordinators, and study group. Gender Differences in In-Hospital Management and Outcomes in Patients With Decompensated Heart Failure: Analysis From the Acute Decompensated Heart Failure National Registry (ADHERE). Journal of Cardiac Failure. 2006;12(2):100-107.
25. Masoudi FA, Rathore SS, Wang Y, Havranek EP, Curtis JP, Foody JM, et al. National patterns of use and effectiveness of angiotensin-converting enzyme inhibitors in older patients with heart failure and left ventricular systolic dysfunction. Circulation. 2004;110(6):724–731.
26. Adams KF, Dunlap SH, Sueta CA, Clarke SW, Patterson JH, Blauwet M, Jensen LR, Tomasko L.Relation between gender, etiology and survival in patients with symptomatic heart failure. J Am Coll Cardiol 1996;28:1781 –8.