10 Year Study Finds Hormone Replacement Therapy Reduces Heart Attack And Heart Failure Risk Dramatically

Dr. Enrique Jacome

Women who receive Hormone Replacement Therapy soon after the menopause have a much lower risk of heart attack, heart failure or dying early compared to women of the same age who do not, Danish researchers reported in the BMJ. 
The team of researchers from Denmark carried out a 10-year long randomized trial, with an extra six years of follow-up to determine what impact HRT might have on cardiovascular risk if it were started soon after menopause.

They recruited 1,006 women and randomly selected them into two groups:

• The HRT group - 504 women
• The non-HRT group - 502 women

All the women were Caucasian, recently menopausal, aged between 45 and 58 years, and healthy. The researchers only included women who had had a hysterectomy if they were aged from 45 to 52. They did not include women with uncontrolled chronic diseases, a medical history of cancer, current or previous HRT use (within the last 3 months), bone disease, drugaddiction, or alcohol dependency.

The researchers used information on diagnoses or death from the Danish Civil Registration System and National Hospital Discharge Register. The primary end-point was a combo of death and hospitalization for heart failure or a heart attack.

After a decade of randomized treatment, the patients were advised to stop HRT after the results of the Women's Health Initiative and the Million Women Study were published.

During this ten year period:

• In the HRT Group - there were 15 deaths and 16 deaths or cardiovascular end-points
• In the non-HRT Group - there were 26 deaths and 33 deaths or cardiovascular end-points

The team followed-up on the women for a further six years. The primary end-point was seen in:

• 33 women in the HRT group - 27 deaths, 3 heart failures, and 3 heart attacks
  Causes of death - 6 cardiovascular deaths and 21 non-cardiovascular deaths
• 53 women in the non-HRT group - 40 deaths, 8 heart failures, and 5 heart attacks
  Causes of death - 23 cardiovascular deaths and 17 non-cardiovascular deaths

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