Arq Bras Cardiol. 2025 Dec;122(12):e20250088. doi: 10.36660/abc.20250088.
ABSTRACT
BACKGROUND: Pulmonary valve regurgitation (PR) is often encountered in cardiac conditions, including heart failure (HF). Although typically tolerated, severe PR can lead to right ventricular dysfunction and negative clinical outcomes; however, its specific impact within the wider HF population needs further clarification.
OBJECTIVES: This study was designed to evaluate the association between the severity of PR and N-terminal pro-B-type natriuretic peptide (pro-BNP) levels, its effect on functional capacity measured by the six-minute walk test (6MWT), and the incidence of significant clinical problems in patients with HF.
METHODS: Between 2016 and 2023, we conducted a retrospective study involving 579 HF patients who underwent echocardiography at two tertiary institutions. Based on semi-quantitatively evaluated PR severity, patients were classified into four groups: No PR, Mild PR, Moderate PR, and Severe PR. Group comparisons used Chi-square tests and Kruskal-Wallis. Multivariate linear regression and Spearman correlation analyses were performed to assess associations.
RESULTS: Pro-BNP levels significantly increased across PR severity groups (Median: 2,157 pg/mL [No PR] to 23,541 pg/mL [Severe PR], p<0.0001). In contrast, 6MWT distance significantly decreased with deteriorating PR severity (Median: 254 m [No PR] to 72 m [Severe PR], p<0.0001). The prevalence of orthopnea and pleural effusion also increased with PR severity. After multivariate adjustment, PR severity remained independently associated with higher pro-BNP levels (β=0.48, p=0.002) and lower 6MWT distance (β=-0.39, p=0.008).
CONCLUSION: In patients with HF, increasing severity of PR is independently associated with elevated pro-BNP levels, reduced functional capacity, and a higher burden of clinical complications.
PMID:41637318 | DOI:10.36660/abc.20250088