Pulmonary congestion assessed by lung ultrasound in patients with severe aortic stenosis undergoing transcatheter aortic valve implantation: Prevalence and prognostic implications

Abstract Aims Lung ultrasound (LUS) is a sensitive tool to assess pulmonary congestion (PC). Few data are available on LUS‐PC evaluation in patients with severe aortic stenosis (AS) undergoing transcatheter aortic valve implantation (TAVI). The aim of this study was to assess the prevalence and prognostic impact of LUS‐PC in patients with severe AS before and after TAVI. Methods and results We designed a single‐centre prospective study in patients referred for TAVI for severe AS ( ClinicalTrials.gov identification number: NCT05024942). All patients underwent echocardiography and LUS (according to a simplified 8‐zone scanning protocol) the day before and within 72 h after the procedure. The primary endpoint was the composite of all‐cause mortality, hospitalization for heart failure and urgent medical visits for worsening dyspnoea at 12‐month follow‐up. A total of 127 patients were enrolled (mean age 81.1 ± 5.8 years; 54.3% female). Pre‐TAVI LUS‐PC was documented in 65 patients (51%). After TAVI, the prevalence of LUS‐PC significantly decreased as compared to pre‐TAVI evaluation, being documented in only 28 patients (22% vs. 51%, p < 0.001) with a median B‐lines score of 4 (interquartile range [IQR] 0–11) versus 11 (IQR 6–19) pre‐TAVI ( p < 0.001). During a median follow‐up of 12 (12–17) months, 25 patients (19.6%) met the composite endpoint. On multivariable Cox regression analysis, pre‐TAVI LUS‐PC was independently associated with cardiovascular events (hazard ratio 2.764, 95% confidence interval 1.114–6.857; p = 0.028). Conclusions Lung ultrasonography reveals a high prevalence of PC in patients with severe AS undergoing TAVI, which is significantly reduced by the procedure. Pre‐TAVI PC, measured by LUS, is an independent predictor of 1‐year clinical outcome.