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Related Experiment Videos

Bone loss after heart transplantation: a prospective study

P N Sambrook1, P J Kelly, A M Keogh

  • 1Bone and Mineral Research Division, Garvan Institute of Medical Research, St. Vincent's Hospital, Darlinghurst, Australia.

The Journal of Heart and Lung Transplantation : the Official Publication of the International Society for Heart Transplantation
|January 1, 1994
PubMed
Summary

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Heart transplant patients experience rapid bone loss, primarily in the first six months post-surgery. Prophylactic bone loss therapy may be most beneficial during this initial 6-12 month period.

Area of Science:

  • Nephrology
  • Endocrinology
  • Orthopedics

Background:

  • Osteoporotic fractures are a significant cause of morbidity in heart transplant recipients.
  • Corticosteroids, commonly used post-transplantation, are known to negatively impact bone health.

Purpose of the Study:

  • To quantify the acute effects of corticosteroid therapy on bone mineral density and turnover after heart transplantation.
  • To identify predictors of bone loss in the first year following heart transplantation.

Main Methods:

  • Bone mineral density was assessed using dual-energy x-ray absorptiometry in 25 heart transplant patients.
  • Biochemical markers of bone turnover were measured at baseline, 6 months, and 12 months post-transplantation.
  • Statistical analyses, including multiple regression, were employed to identify predictors of bone loss.

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Main Results:

  • Rapid bone loss occurred in 96% of patients within the first 6 months, most notably in the lumbar spine (-7.4%).
  • Bone loss slowed considerably in the second 6 months, with a total lumbar spine loss of -7.8% over 12 months.
  • Increased serum osteocalcin and testosterone levels, and decreased urinary hydroxyproline:creatinine ratio were observed at 6 months. Serum osteocalcin was the sole significant predictor of lumbar spine bone loss.

Conclusions:

  • Bone loss after heart transplantation is most pronounced in the first 6-12 months.
  • Serum osteocalcin levels are a key predictor of bone loss in this patient population.
  • Prophylactic bone loss prevention strategies may be most critical during the initial post-transplant period.