Relationship Between Hyperglycemia and Heart Transplant Rejection

Area of Science:

• Cardiology
• Transplantation Medicine
• Endocrinology

Background:

• Hyperglycemia is a known risk factor for kidney and liver transplant rejection.
• The impact of glycemic control on heart transplant rejection remains less understood.
• Effective post-transplant management is crucial for long-term graft survival.

Purpose of the Study:

• To investigate the association between perioperative and subsequent glycemic control and heart transplant rejection.
• To analyze rejection rates in heart transplant patients over one year post-transplantation.
• To identify factors influencing the risk of heart transplant rejection.

Main Methods:

• Retrospective analysis of 157 heart transplant patients from June 2005 to December 2012.
• Analysis of perioperative glucose levels and comparison between patients with and without rejection.
• Rejection assessment based on routine follow-up biopsy specimens (grade ≤1R vs. ≥2R).

Main Results:

• No significant difference in preoperative or inpatient glucose levels between rejection groups.
• Mean glucose levels from discharge to 1 year trended higher in the higher rejection grade group (≥2R) (142.2 ± 46.6 mg/dL vs. 128.8 ± 40.9 mg/dL, P = .084).
• Older age and higher BMI were associated with lower odds of developing grade ≥2R rejection.

Conclusions:

• The trend between glucose levels and heart transplant rejection was not statistically significant.
• The possibility that significantly higher glucose levels could influence rejection rates cannot be excluded.
• Further research is needed to clarify the role of glycemic control in heart transplant outcomes.