While researching today I came across this article suggesting that extreme E2 levels put the cardiovascular system a risk.
Men with chronic heart failure have a significantly increased mortality risk if their estradiol levels are at the extreme ends of the concentration range, a Polish-led group reported. Action Points Explain to patients that men with chronic heart failure may have an increased risk of dying if their serum estradiol is elevated or very low.
The study was observational and therefore cannot prove that estradiol levels influence mortality risk in men with CHF. Men with low estradiol levels had as much as a 50% lower survival compared with men who had mid-range levels of the female hormone, according to Ewa A. Jankowska, M.D., Ph.D., of the Military Hospital in Wroclaw, and colleagues.
Estrogen has beneficial effects on the myocardium and vasculature, including attenuation of remodeling and cardiomyocyte apoptosis. The cardioprotective effects may explain the association between low estradiol and an increased risk of cardiovascular events in men, the authors said.
Derangement of adrenal androgen metabolism often accompanies heart failure in men and has unfavorable clinical and prognostic implications, they continued. Dr. Jankowska and colleagues hypothesized that similar disturbances in estrogen synthesis might also occur.
During three years of follow-up, 171 (34%) study participants died. Investigators found that men with the lowest estradiol levels had a mortality hazard ratio of 4.17 (P<0.001) compared with patients in the middle quintile. Men in the top quintile had more than double the mortality risk (HR 2.33, P<0.001).
Three-year survival by increasing quintile of estradiol was 44.6%, 65.8%, 82.4%, 79%, and 63.6% (P<0.001 for trend).
The authors found that men with the highest and lowest estradiol levels had distinguishing clinical characteristics.
Those in quintile 1 had higher serum total testosterone, decreased serum DHEA-S, more advanced heart failure, impaired renal function, and decreased fat mass (P<0.05 versus quintile 3).
Friday morning
