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Pre-transplant coronary artery disease increases all-cause mortality and post-transplant cardiovascular events in kidney recipientsPre-existing heart disease increases risks for kidney transplant patients

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Key Takeaway
Note that pre-transplant coronary artery disease is associated with higher mortality and cardiovascular events in kidney recipients.

This meta-analysis analyzed data from 112,416 kidney transplant recipients to evaluate the impact of pre-existing coronary artery disease (CAD) on post-transplant outcomes. The study focused on three primary outcomes: all-cause mortality, post-transplant cardiovascular events, and graft failure.

The analysis found that patients with pre-transplant CAD faced a significantly higher risk of all-cause mortality (HR = 1.68; 95% CI: 1.38-2.06, P <.01) compared to those without CAD. Furthermore, the risk of post-transplant cardiovascular events was substantially higher in patients with pre-transplant CAD (HR = 2.78; 95% CI: 2.00-3.86, P <.01). Graft failure was also more common in recipients with pre-transplant CAD (HR = 1.09; 95% CI: 1.03-1.16, P <.01).

The authors noted high heterogeneity for the all-cause mortality outcome (I2 = 60.0%). These findings suggest that pre-existing CAD is a significant indicator of risk in the transplant population. Clinicians should consider these results to emphasize the importance of rigorous cardiovascular risk assessment and management for transplant candidates with known coronary artery disease.

Living with heart disease already puts a strain on the body, but it can create specific hurdles for those waiting for a life-saving organ. New data involving over 112,000 kidney transplant recipients shows that having coronary artery disease (CAD) before surgery leads to much tougher outcomes after the procedure.

Patients with this pre-existing heart condition faced a significantly higher risk of death from any cause compared to those without it. The study also found these patients were nearly three times more likely to experience cardiovascular events after their transplant. Additionally, there was a measurable increase in graft failure, which is when the transplanted kidney stops working.

While the data shows a clear link between heart health and transplant success, the results for overall mortality had some variability across different studies. These findings highlight why doctors must focus on managing heart health closely for every transplant candidate to improve long-term survival.

What this means for you:
Patients with pre-existing coronary artery disease face higher risks of death and graft failure after a kidney transplant.

Common questions

How does heart disease affect the success of a kidney transplant?

Patients with pre-existing coronary artery disease (CAD) face significantly higher risks after surgery. This includes a much higher risk of cardiovascular events and an increased likelihood of graft failure, which is when the new kidney stops functioning correctly.

What are the specific risks for patients with CAD?

The data shows that patients with pre-transplant coronary artery disease have a significantly higher risk of all-cause mortality and a nearly three times higher risk of post-transplant cardiovascular events compared to those without heart disease.

Does this mean heart disease prevents a successful transplant?

The study shows a strong association between pre-existing heart disease and poorer outcomes, but it does not prove that the heart condition directly causes these failures. It highlights the need for better heart health management before surgery.

Study Details

Study typeMeta analysis
EvidenceLevel 1
PublishedJun 2026
View Original Abstract ↓
BACKGROUND: Kidney transplant recipients with pre-existing atherosclerosis or coronary artery disease (CAD) have an increased risk of adverse post-transplant outcomes. However, the extent to which pre-transplant CAD influences mortality, cardiovascular events, and graft function remains unclear. This systematic review and meta-analysis aims to evaluate the impact of pre-existing CAD on all-cause mortality, post-transplant cardiovascular events, and graft failure in kidney transplant recipients. METHODS: A systematic literature search was conducted using PubMed, Scopus, Web of Science, Cochrane Library, and Ovid MEDLINE. Studies reporting outcomes in kidney transplant recipients with and without pre-existing CAD were included. The primary outcomes were all-cause mortality, major cardiovascular events, and graft failure post-transplantation. Risk estimates were pooled using a random-effects model, with heterogeneity assessed using the I² statistic. The study protocol was registered with PROSPERO (CRD42024600751). RESULTS: A total of 16 studies involving 112,416 kidney transplant recipients were included. Patients with pre-transplant CAD had a significantly higher risk of all-cause mortality compared to those without CAD (hazard ratio [HR] = 1.68, 95% confidence Interval [CI]: 1.38-2.06, P < .01), with high heterogeneity (I² = 60.0%). The risk of post-transplant cardiovascular events was also significantly increased in patients with CAD (HR = 2.78, 95% CI: 2.00-3.86, P < .01), with moderate heterogeneity (I² = 36.1%). Graft failure was more common in recipients with pre-transplant CAD, although the effect size was smaller (HR = 1.09, 95% CI: 1.03-1.16, P < .01), with no observed heterogeneity (I² = 0%). CONCLUSIONS: Pre-existing CAD in kidney transplant recipients is associated with a significantly increased risk of all-cause mortality and post-transplant cardiovascular events, as well as a modestly but significantly increased risk of graft failure. These findings stress the need for enhanced cardiovascular risk assessment and management strategies in transplant candidates with CAD to improve long-term outcomes.
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