Predictors of right ventricular function improvement with sacubitril/valsartan in a real-life population of patients with chronic heart failure

Background Observational studies have demonstrated that treatment with sacubitril/valsartan may improve left ventricular (LV) systolic and diastolic function in subjects with reduced LV ejection fraction (LVEF) in real-world studies. Subjects with heart failure and reduced EF (HFrEF), however, are also characterized by an impaired right ventricular (RV) function. We therefore aimed to evaluate whether also RV function may improve after S/V therapy and possible predictors of RV improvement could be identified at echocardiography and tissue Doppler imaging. Methods Fifty consecutive patients (67 +/- 8 years, LVEF 28 +/- 6%, male 86%) with chronic HFrEF and NYHA class II-III were followed up for 6 months after therapy with S/V. LV&RV function was assessed at baseline and after 6 months of therapy. Results After 6-month therapy with S/V a significant improvement was shown in the following echocardiography parameters assessing RV function: PAsP (31 +/- 11 vs. 35 +/- 10 mmHg, p < 0.001), TAPSE (19 +/- 3 vs. 18 +/- 3 mm, p < 0.001), RV FAC (38 +/- 7 vs. 34 +/- 6 mm, p < 0.001), RV S' (12 +/- 2 vs. 10 +/- 2 cm/s, p < 0.001), RV-FW-LS (-20 +/- 5 vs. -18 +/- 5%, p < 0.001), RV-4Ch-LS (-16 +/- 5 vs. -14 +/- 5%, p < 0.001). At multivariable analysis improvement in RV-FW-LS was associated to baseline levels of RV S' (r 0.75, p < 0.01) and RAV (r -0.32, p < 0.05). Conclusions In a real-world scenario, 6-month therapy with S/V was associated with an improved RV function in HFrEF. RV function improvement may be predicted by assessing baseline RV S' and right atrial volume values.