Key result
LAVI > 50 mL/m2 linked to ~345% higher cardiovascular risk in progressive mitral stenosis.
Why the study?
Data were limited on the prognosis of progressive mitral stenosis, prompting an evaluation of factors associated with adverse events in this population.
Does a left atrial volume index > 50 mL/m² predict adverse clinical outcomes in patients with progressive mitral stenosis?
Cohort (n=225)
No
Does a left atrial volume index > 50 mL/m² predict adverse clinical outcomes in patients with progressive mitral stenosis?
In patients with progressive mitral stenosis, a left atrial volume index > 50 mL/m² is a strong independent predictor of adverse cardiovascular events and the need for valve intervention.
Answers are grounded in this paper and cite their sources.
Supports LAVI-based risk stratification in progressive mitral stenosis; leaves open whether thresholds should guide intervention timing.
BACKGROUND: Limited data are available on the prognosis of progressive mitral stenosis (MS). We evaluated the factors associated with adverse events in patients with progressive MS. METHODS: We retrospectively analyzed 259 consecutive patients with pure progressive MS with a mitral valve area (MVA) between 1.5 and 2.0 cm². The primary outcome measures were a composite endpoint of cardiac death, heart failure hospitalization, mitral valve surgery or percutaneous mitral valvuloplasty, and ischemic stroke. RESULTS: The mean patient age was 62 ± 12 years, and the mean MVA was 1.71 ± 0.15 cm². Over a median follow-up duration of 52 months, a total of 41 patients (18.3%) experienced the composite endpoint. In multivariable Cox regression analysis, prior stroke (hazard ratio [HR], 4.54; 95% confidence interval [CI], 2.16-9.54; p < 0.001) and left atrial volume index (LAVI) of > 50 mL/m² (HR, 4.45; 95% CI, 1.31-15.31; p = 0.017) were identified as independent predictors of the composite endpoint, even after adjusting for age and sex. Patients with a LAVI ≤ 50 mL/m² demonstrated favorable event-free survival compared with those with a LAVI > 50 mL/m² in either the overall population (p < 0.001) or asymptomatic patients (p = 0.002). Atrial fibrillation (AF), left ventricular mass index (LVMI), MVA, and mean diastolic pressure were factors independently associated with LAVI (all p < 0.05). CONCLUSIONS: A deleterious impact of a high LAVI on outcome was observed in patients with progressive MS. The LAVI was mainly influenced by the presence of AF, the severity of MS, and LVMI in this population.
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Cho et al. (2019) conducted a cohort in Progressive Mitral Stenosis (n=225). Left atrial volume index (LAVI) > 50 mL/m2 vs. LAVI ≤ 50 mL/m2 was evaluated on Composite of cardiac death, heart failure hospitalization, mitral valve surgery or percutaneous mitral valvuloplasty, and ischemic stroke (HR 4.45, 95% CI 1.31-15.31, p=0.017). In patients with progressive mitral stenosis, a left atrial volume index > 50 mL/m2 was independently associated with an increased risk of adverse cardiovascular events (HR 4.45).
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