Stroke Risk Factors in Hemodialysis Patients

Hemodynamic instability and hypotension during and immediately after hemodialysis represent the most critical modifiable risk factor for stroke in this population, with approximately 38% of ischemic events occurring during or within 12 hours of dialysis sessions, according to the Kidney International guidelines 1

Higher mean arterial pressure extrema point frequencies, indicating greater hemodynamic instability, correlate directly with brain white matter damage and worse neurocognitive outcomes, as noted by the Kidney International guidelines 1, 3, 4

Evidence for Hypotension as the Primary Risk Factor

Post-dialytic drops in systolic blood pressure greater than 30 mmHg are associated with increased mortality, while drops up to 30 mmHg show better survival, highlighting the importance of hemodynamic stability, as recommended by the Kidney International guidelines 1, 2, 3
The American Journal of Kidney Diseases notes that targeting higher hemoglobin levels with erythropoietin-stimulating agents actually doubles stroke risk, making hemoglobin targets between 100-120 g/L a manageable risk factor 1, 2, 3, 4

The Kidney International guidelines suggest that hemodiafiltration with convection therapy demonstrates a 61% risk reduction in stroke in a multicenter RCT of 906 chronic hemodialysis patients, likely through improved hemodynamic stability 1, 2, 3, 4
Dialysate cooling prevents progression of brain white matter damage by reducing hemodynamic instability, as noted by the Kidney International guidelines 1, 3, 4, 9
More frequent hemodialysis improves surrogate markers of stroke risk including hypertension control and left ventricular mass, according to the Kidney International guidelines 1, 2, 3

Intensive blood pressure control that benefits non-dialysis CKD patients may be deleterious for dialysis patients, emphasizing that the hemodynamic instability during dialysis—not just absolute blood pressure values—drives stroke risk, as highlighted by the Kidney International guidelines and Praxis Medical Insights 1, 2, 9