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Related Concept Videos

Menopause01:28

Menopause

Menopause, a natural biological process marking the end of a woman's fertility, typically occurs between the fifth and sixth decade of life. This phase is characterized by the exhaustion of the ovarian follicle pool, leading to less responsive ovaries despite the high levels of Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH). The consequential decrease in estrogen production results in symptoms like hot flashes, heavy sweating, headaches, hair loss, muscle pains, vaginal...
Hormonal Regulation of the Menstrual Cycle01:22

Hormonal Regulation of the Menstrual Cycle

The ovarian cycle regulates endometrial changes throughout a single menstrual cycle via the coordinated action of gonadotrophin-releasing hormone (GnRH) and gonadotrophins.
At puberty, GnRH begins a pulsatile release pattern, which triggers the anterior pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). The frequency and amplitude of GnRH pulses vary across the menstrual cycle, with faster pulses favoring LH release and slower pulses favoring FSH release.
Hormonal Regulation of Blood Pressure01:17

Hormonal Regulation of Blood Pressure

Endocrinal or hormonal intervention in the cardiovascular system is predominantly exerted by the catecholamines - epinephrine and norepinephrine, as well as a slew of hormones that interact with renal function to modulate blood volume.
Epinephrine and Norepinephrine
The adrenal medulla releases epinephrine and norepinephrine, catecholamines that enhance and extend the sympathetic or "fight or flight" physiological response. These hormones escalate heart rate and the force of contraction while...
Cardiovascular Drugs: Classification based on Therapeutic Indications01:18

Cardiovascular Drugs: Classification based on Therapeutic Indications

Cardiovascular diseases, encompassing a range of conditions, can significantly affect the heart's operations and the overall circulatory system. These conditions impair the heart's ability to pump blood, leading to a deficit in oxygen supply to crucial organs. Anomalies in the heart's electrical system, known as arrhythmias, can cause heartbeats to accelerate or slow down. Usually, heart rates increase during physical activity and decrease while resting or sleeping. However, frequent irregular...
Hormonal Regulation01:40

Hormonal Regulation

Hormones regulate a significant portion of digestion through activation of the neuroendocrine system. The neuroendocrine system of digestion contains many different hormones all with multiple functions that are both, directly and indirectly, involved in digestion.
Hormonal Regulation01:33

Hormonal Regulation

The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.

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Related Experiment Video

Updated: Jun 2, 2026

An In Vivo Estrogen Deficiency Mouse Model for Screening Exogenous Estrogen Treatments of Cardiovascular Dysfunction After Menopause
06:18

An In Vivo Estrogen Deficiency Mouse Model for Screening Exogenous Estrogen Treatments of Cardiovascular Dysfunction After Menopause

Published on: August 13, 2019

[Postmenopausal hormone replacement therapy and the cardiovascular system].

Aylin Yildirir1

  • 1Başkent Universitesi Tip Fakültesi, Kardiyoloji Anabilim Dali, Ankara. ayliny@baskent-ank.edu.tr

Turk Kardiyoloji Dernegi Arsivi : Turk Kardiyoloji Derneginin Yayin Organidir
|April 16, 2011
PubMed
Summary

Postmenopausal hormone replacement therapy (HRT) does not protect against cardiovascular disease and may increase risk. Focus on proven strategies like diet and exercise instead.

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Area of Science:

  • Cardiovascular disease in women
  • Endocrinology
  • Hormone replacement therapy

Context:

  • Women's cardiovascular disease risk increases post-menopause due to declining estrogen.
  • Historically, hormone replacement therapy (HRT) was believed to be cardioprotective based on observational studies.
  • Recent trials contradict earlier findings, indicating HRT may not offer cardiovascular benefits.

Purpose:

  • To evaluate the cardiovascular effects of postmenopausal hormone replacement therapy (HRT).
  • To reconcile conflicting results between observational studies and randomized controlled trials on HRT and cardiovascular events.
  • To determine the influence of menopausal stage and vascular health on HRT's cardiovascular impact.

Summary:

  • Observational studies suggested HRT reduced cardiovascular disease risk by 35-50% in younger, early-menopausal women.
  • Randomized trials involving older women, or those longer post-menopause, showed neutral or negative cardiovascular effects.
  • Estrogen's vascular effects depend on atherosclerosis stage: protective in early stages, potentially harmful in advanced disease.

Impact:

  • Current evidence advises against using HRT for cardiovascular disease prevention in postmenopausal women.
  • Highlights the critical need to identify women at risk from HRT based on menopausal status and vascular health.
  • Emphasizes the importance of underutilized preventive strategies like diet, exercise, and managing blood pressure and cholesterol.