Testosterone replacement protects men with preexisting heart disease

[style=font-weight:bold;]1206M-07 - Clinical Effects of Testosterone Supplementation Among Hypo-Androgenic Men With Preexisting Severe Coronary Artery Disease: The Intermountain Heart Collaborative Study[/style]





http://www.abstractsonline.com/pp8/#!/3874/presentation/43323



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Authors

Tami L. Bair, Heidi May, Viet T. Le, Donald Lappe, Jeffrey Anderson, J. Muhlestein, Intermountain Medical Center, Murray, UT, USA



Abstract



Introduction: Low serum testosterone (T) is an independent risk factor for CV and total mortality. The impact of T therapy on CV outcomes, especially among older men with pre-existing severe CAD, is unknown.



Methods: All men >50 yrs of age, with severe CAD (&#8805;70% stenosis), a low (<212 ng/dL) baseline T level, 1 follow-up (f/u) T level and 3 yrs of clinical f/u were evaluated. T was stratified into categories: persistent low (742). Cox hazard regression analysis was performed to associate T categories with major adverse cardiovascular events (MACE) including death [D], non-fatal MI, and stroke.



Results: A total of 755 men (age 68.0 ± 9.6 y, diabetes: 50%, hypertension: 83%, hyperlipidemia: 81%, smokers: 33%, prior MI: 23%) were studied. Event rates at 1 and 3-y by achieved T level, and adjusted HRs, are shown in Table. Overall 3-y rates of MACE, D and MI were 24.5%, 17.6% and 8.1% respectively. Pts supplemented to normal/high T had reduced 3-y MACE (HR=0.77 [0.56-1.04]), D (HR=0.67 [0.47-0.97]) and MI (HR 0.52 [0.31, 0.87]) compared to low T subjects. Results were similar for 1-y MACE (HR=0.63 [0.40, 1.00]), D (HR=0.93 [0.51, 1.69]) and MI (HR=0.26 [0.31, 0.87]).



Conclusions: Among elderly men with severe CAD and low T, T therapy was associated with reduced MACE, D and MI over 3-y compared to no or ineffective supplementation. A marked protective effect of T supplementation on MI incidence during first yr of f/u was noted, giving further evidence of CV safety associated with T supplementation.
 

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Understanding Your Hormones

Estradiol (E2)

A form of estrogen produced from testosterone. Important for bone health, mood, and libido. Too high can cause side effects; too low can affect well-being.

DHT

Dihydrotestosterone is a potent androgen derived from testosterone. Affects hair growth, prostate health, and masculinization effects.

Free Testosterone

The biologically active form of testosterone not bound to proteins. Directly available for cellular uptake and biological effects.

Scientific Reference

Lakshman KM, Kaplan B, Travison TG, Basaria S, Knapp PE, Singh AB, LaValley MP, Mazer NA, Bhasin S. The effects of injected testosterone dose and age on the conversion of testosterone to estradiol and dihydrotestosterone in young and older men. J Clin Endocrinol Metab. 2010 Aug;95(8):3955-64.

DOI: 10.1210/jc.2010-0102 | PMID: 20534765 | PMCID: PMC2913038

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