Rise and fall of hormone therapy in postmenopausal women with cardiovascular disease

Area of Science:

• Cardiovascular Science
• Endocrinology
• Women's Health

Background:

• Observational studies suggest hormone therapy (HT) protects postmenopausal women from cardiovascular disease (CVD).
• Randomized trials indicate HT may harm the vascular system.
• Discrepancies in HT outcomes necessitate investigating its vascular effects.

Purpose of the Study:

• To analyze HT's impact on lipids, hemostasis, inflammation, and vascular wall.
• To explore reasons for conflicting results between observational and experimental HT studies.
• To determine the critical role of timing in HT's vascular effects.

Main Methods:

• Review of existing data on HT's effects on cardiovascular parameters.
• Analysis of lipid profiles, hemostatic markers, and inflammatory indicators.
• Comparison of outcomes based on initiation time of HT relative to menopause and cardiovascular events.

Main Results:

• Conflicting results from observational versus randomized trial data on HT and CVD.
• Vascular effects of HT appear dependent on the duration of use and timing of initiation.
• Early HT initiation for menopausal symptoms shows different outcomes than late initiation or use post-cardiovascular event.

Conclusions:

• The timing of hormone therapy (HT) initiation is critical for its vascular effects.
• Chronic HT use may not have harmful effects, but initiating HT years after menopause or after a cardiovascular event increases risks.
• HT may be more effective in maintaining vascular health than reversing endothelial dysfunction, especially when started closer to menopause.