Outcomes of Transcatheter Aortic Valve Implantation in Patients With Chronic and End-Stage Kidney Disease

Transcatheter aortic valve replacement in patients with chronic kidney disease: a multi-centre retrospective study

Background

Chronic kidney disease (CKD) is a common comorbid condition in patients undergoing transcatheter aortic valve replacement (TAVR). Reported outcome studies on the association of baseline CKD and mortality is currently limited.

Objectives

To determine the prevalence of chronic kidney disease in patients undergoing TAVR and analyse their overall procedural outcomes.

Methods

This retrospective observational study was conducted at 43 publicly funded hospitals in Hong Kong. Severe aortic stenosis patients undergoing TAVR between the years 2010 and 2019 were enroled in the study. Two groups were identified according to the presence of baseline chronic kidney disease.

Results

A total of 499 patients (228, 58.6% men) were enroled in the study. Baseline hypertension was more prevalent in patients with CKD (82.8%; P=0.003). As for primary end-points, mortality rates of CKD patients were significantly higher compared to non-CKD patients (10% vs. 4.1%; P=0.04%). Gout and hypertension were found to be significantly associated with CRF. Patients with gout were nearly six times more likely to have CRF than those without gout (odds ratio = 5.96, 95% CI = 3.12-11.29, P<0.001). Patients with hypertension had three times the likelihood of having CRF compared to those without hypertension (odds ratio=2.83, 95% CI=1.45-6.08, P=0.004).

Conclusion

In patients with severe aortic stenosis undergoing TAVR, baseline CKD significantly contributes to mortality outcomes at long-term follow up.

Valvular heart disease in patients on kidney replacement therapy: "opening Pandora's box"

Valvular heart disease (VHD) is highly prevalent among dialysis patients, affecting up to 30%-40% of the population. Aortic and mitral valves are the most frequently affected and commonly lead to valvular stenosis and regurgitation. Although it is well established that VHD is associated with a high morbimortality burden, the optimal management strategy remains unclear, and treatment options are limited due to the high risk of complications and mortality after surgical and transcatheter interventions. In this issue of Clinical Kidney Journal, Elewa et al. provide new evidence in this field by reporting the prevalence and associated outcomes of VHD in patients with kidney failure on renal replacement therapy.