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Blood Pressure and Living Kidney Donors: A Clinical Perspective
Anjay Rastogi1, Stanley Yuan1, Farid Arman1
1Division of Nephrology, Department of Medicine, David Geffen School of Medicine UCLA, Los Angeles, CA.
Insights
Living kidney donors with elevated blood pressure (BP) do not show significantly worse kidney function post-donation. Individualized BP targets and lifestyle changes are crucial for donor safety.
Area of Science:
- Nephrology
- Cardiology
- Transplantation
Background:
- Elevated blood pressure (hypertension) is a key exclusion criterion for living kidney donation due to risks of renal and cardiovascular disease.
- Current guidelines exclude donors with BP >140/90 mm Hg on medication or with end-organ damage.
- Recent AHA/ACC guidelines redefine hypertension, potentially impacting donor eligibility criteria.
Purpose of the Study:
- To evaluate the impact of elevated blood pressure on living kidney donor outcomes.
- To understand the implications of evolving hypertension definitions on kidney donor selection.
- To identify risk factors for developing elevated BP post-donation.
Main Methods:
- Comparative analysis of kidney function (eGFR) in living kidney donors with and without elevated BP.
- Review of current and updated hypertension guidelines relevant to living kidney donation.
- Identification of demographic and lifestyle risk factors associated with post-donation hypertension.
Main Results:
- Living kidney donors with elevated BP demonstrated no significant decline in kidney function (eGFR) compared to normotensive donors post-donation.
- Kidney donation itself is not a primary risk factor for developing hypertension.
- African American or Hispanic descent, obesity, and age are identified risk factors for post-donation elevated BP.
Conclusions:
- The kidney function of living kidney donors with elevated BP is comparable to normotensive donors.
- Individualized management of blood pressure targets and antihypertensive medications is essential for living kidney donors.
- Lifestyle modifications are recommended to manage blood pressure in living kidney donors, aiming for <130/80 mm Hg.
Abstract:
Elevated blood pressure (BP), or "hypertension," has been one of the main exclusion criteria for living kidney donation, as it is a risk factor for renal and cardiovascular disease. The effect of elevated BP in living kidney donors is not well studied or understood. The most current living kidney donation guidelines state that donors with a BP >140/90 mm Hg with 1-2 antihypertensive medications or evidence of end-organ damage should be excluded from living kidney donation. Yet, the definitions of "hypertension" have changed with the release of the American Heart Association (AHA)/American College of Cardiology (ACC) clinical practice guidelines suggesting that 120-129 mm Hg is elevated BP and Stage 1 hypertension is 130 mm Hg. However, the kidney function (in terms of estimated GFR) of "hypertensive" living kidney donors does not fare significantly worse postdonation compared with that of "normotensive" donors. In addition, even though living kidney donation itself is not considered to be a risk factor for developing hypertension, there exist certain risk factors (African American or Hispanic descent, obesity, age) that may increase the risk of living kidney donors developing elevated BP postdonation. The choice of BP targets and medications needs to be carefully individualized. In general, a BP <130/80 mm Hg is needed, along with lifestyle modifications.
Related Concept Videos
01:28Kidney Transplant I: Introduction
01:26Kidney Transplant II: Surgical Procedure
01:45Kidney Structure
01:16Kidney Transplant III: Nursing Management
01:18Hypertension and Regulation of Blood Pressure
01:28Special considerations while measuring blood pressure
Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.