# Glycocalyx Disintegration Is Associated with Mortality in Chronic Heart Failure

## TL;DR

Loss of the glycocalyx layer in blood vessels is linked to higher mortality in patients with chronic heart failure.

## Contribution

This study shows that glycocalyx disintegration is a novel predictor of mortality in chronic heart failure patients.

## Key findings

- Non-survivors had significantly reduced glycocalyx thickness (PBR) compared to survivors after one and two years.
- A PBR of 1.9 μm was the best predictor of two-year mortality with 81% sensitivity and 59% specificity.
- PBR and functional capillary density were significant predictors of two-year mortality in multivariate analysis.

## Abstract

Background: Glycocalyx disintegration is associated with adverse outcomes in patients with trauma or sepsis. As microvascular dysfunction has an impact on disease progression in chronic heart failure (CHF) patients, we hypothesized that changes in microcirculation might be associated with mortality. Methods: Fifty patients with ischemic and non-ischemic cardiomyopathy and conservative treatment with baseline measurements of the sublingual microcirculation (via Sidestream Darkfield videomicroscopy) were followed up for two years. Glycocalyx thickness was assessed indirectly by calculation of the perfused boundary region (PBR). Results: Loss of glycocalyx was pronounced in non-survivors after one, n = 10, and two years, n = 16; PBR: 2.05 μm (1.88–2.15 μm) vs. 1.87 μm (1.66–2.03 μm) and 2.04 (1.93–2.11) vs. 1.84 (1.62–1.97); p = 0.042 and p = 0.003, respectively. Area under the ROC curve for the analysis of the predictive value of PBR on two-year mortality was 0.77 (p = 0.003; SE: 0.07, CI (95%): 0.63–0.91). ROC curve analysis determined a PBR of 1.9 μm as the best predictor for two-year mortality (sensitivity: 0.81; specificity: 0.59). Moreover, multivariate regression analysis revealed PBR and functional capillary density as significant predictors of two-year mortality, p = 0.036 and p = 0.048, respectively. Conclusions: Glycocalyx disintegration is related to poor overall survival in CHF patients.