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Risk factors for cardiovascular events after successful renal transplantation
Yves F C Vanrenterghem1, Kathleen Claes, Giuseppe Montagnino
1Department of Nephrology, University Hospital of K.U. Leuven, Leuven, Belgium. yves.vanrenterghem@uz.kuleuven.be
Insights
Cardiovascular events are common after kidney transplants. Risk factors include pre-existing conditions, transplant factors, and immunosuppressive drugs, impacting long-term survival.
Area of Science:
- Nephrology
- Cardiology
- Transplantation Medicine
Background:
- Cardiovascular disease is a significant cause of morbidity post-renal transplantation.
- Long-term outcomes require understanding post-transplant cardiovascular event incidence and risk factors.
Purpose of the Study:
- To evaluate the incidence of cardiovascular events after renal transplantation.
- To identify key risk factors for cardiovascular complications and mortality in renal transplant recipients.
Main Methods:
- Analysis of clinical events, biochemistry, and medications in 2071 white adults post-renal transplant.
- Data collected at 1, 6, and 12 months, and annually thereafter.
Main Results:
- Cardiovascular event incidence increased over time; 53% experienced events by 15 years.
- Key risk factors identified: male gender, age, pre-transplant hypertension, longer dialysis, prior cardiovascular events, post-transplant diabetes, corticosteroids, azathioprine, increased pulse pressure, low albumin, and high triglycerides.
- Increased mortality risk associated with low/high hematocrit; optimal range around 38%.
Conclusions:
- Post-transplant cardiovascular events stem from baseline risks, immunosuppressive drugs, and post-transplant factors.
- Comprehensive risk factor management is crucial for improving outcomes in renal transplant patients.
Background:
Cardiovascular disease is a frequent cause of morbidity after renal transplantation. The aims of this study were to evaluate the incidence of cardiovascular events and to identify the main risk factors for cardiovascular complications and mortality in 2071 white adults with a renal transplant functioning for at least 1 year.
Methods:
Clinical events, routine biochemistry, and prescribed drugs at month 1, month 6, and yearly after transplantation were analyzed.
Results:
The incidence of cardiovascular events increased over time. At 15 years after transplantation, only 47% of surviving patients had not experienced any cardiovascular event. Risk factors associated with cardiovascular complications were male gender (P=0.04), age (P<0.0001), arterial hypertension before transplantation (P<0.0001), longer pretransplant dialysis (P<0.0001), cardiovascular event before transplantation (P<0.0001), older era of transplantation (P=0.0009), center-specific effect (P=0.003), posttransplant diabetes mellitus (P=0.01), increased pulse pressure after transplantation (P=0.02), intake of corticosteroids (P=0.016), intake of azathioprine (P=0.016), lower serum albumin after transplantation (P=0.004), and higher serum triglyceride levels after transplantation (P=0.007). The risk of death was increased in patients with low or elevated hematocrit, while it was minimal with values around 38%.
Conclusions:
The occurrence of fatal and nonfatal cardiovascular events after successful renal transplantation not only relates to baseline cardiovascular risk factors present at transplantation, but also to immunosuppressive drugs and posttransplantation traditional and nontraditional risk factors.
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