small study published in April 2010 of 191 men average age 64 years old w/HF (both systolic w/loss of ejection fraction (EF <40%) as well as diastolic w/preserved EF >40%). Total & free testosterone along w/DHEA-S were measured prior to following these patients for close to 3 years.
Researchers noted no correlation between total testosterone and New York Heart Association (NYHA) classification & all-cause mortality. However, free testosterone & DHEA-S were both inversely correlated with NYHA class and all-cause mortality.
But due to confounding factors, the authors could not unequivocally report an association between androgens and mortality since poor health may have begotten the decrease in testosterone. Remember association does not prove causation. Nonetheless, I believe this possible link bears close monitoring. Further details to come . . .