Correlations between echocardiographic parameters of right ventricular dysfunction and Galectin-3 in patients with...

To evaluate the association between echocardiographic right ventricular (RV) structural and functional parameters and galectin-3 levels in patients with chronic obstructive pulmonary disease (COPD) and associated pulmonary hypertension presenting with acutely aggravated dyspnoea.

We conducted a prospective study on forty patients with COPD and forty healthy volunteers matched for age and sex (mean age 59+/-6 years), measuring galectin-3 and NT-proBNP serum levels and specific echocardiographic parameters.

Galectin-3 was significantly higher in patients with COPD and elevated systolic pulmonary artery pressure than in healthy volunteers and discriminated better between patients with likely and possible pulmonary hypertension when compared to NT-proBNP. In multivariate analysis, the global model was better related to galectin-3 than to NT-proBNP levels (R²=0.61 vs. 0.31, p<0.001). Moreover, in contrast to NT-proBNP levels, correlations between galectin-3 levels and RV dysfunction, as assessed by the E/E' ratio and RV ejection fraction, persisted after adjustment for cardiovascular risk factors and COPD-induced inflammation.

In patients with COPD-associated pulmonary hypertension presenting with acutely aggravated dyspnoea, galectin-3 levels are predictive of RV dysfunction and correlate better with RV dysfunction parameters compared to NT-proBNP.