Intensive blood pressure control is associated with improved patient and graft survival after renal transplantation

Area of Science:

• Nephrology
• Cardiology
• Transplantation

Background:

• Recent American hypertension guidelines, influenced by the SPRINT trial, recommend a blood pressure goal of 130/80 mmHg for chronic kidney disease (CKD) patients.
• European guidelines suggest a systolic blood pressure (SBP) target of 130-139 mmHg for CKD patients.
• The optimal SBP target for renal transplant recipients remains an area of investigation, particularly concerning the safety and efficacy of stricter targets.

Purpose of the Study:

• To investigate whether achieving an SBP below 130 mmHg offers additional benefits in renal transplant recipients.
• To compare patient and graft survival rates across different SBP strata in this population.

Main Methods:

• Retrospective analysis of 815 renal transplant recipients.
• Stratification based on mean office SBP: <130 mmHg, 130-139 mmHg, or ≥140 mmHg.
• Composite endpoint of patient and graft survival over 120 months, analyzed using Cox regression adjusted for age, gender, and eGFR.

Main Results:

• A mean SBP <140 mmHg was significantly associated with better survival compared to SBP ≥140 mmHg (p < 0.001).
• Cox regression analysis confirmed improved survival for SBP <130 mmHg and 130-139 mmHg compared to ≥140 mmHg (p = 0.007, HR = 0.58).
• While not significant for graft survival alone, SBP <130 mmHg was linked to lower mortality than the conservative goal of <140 mmHg.

Conclusions:

• The stricter SBP target of <130 mmHg appears safe for renal transplant recipients.
• Achieving SBP <130 mmHg may be associated with improved patient survival, supporting the updated American Heart Association (AHA) blood pressure targets.
• Further prospective studies are warranted to confirm these findings, given the retrospective nature of this analysis.