Key result
In patients with non-valvular atrial fibrillation, significant valvular heart disease was associated with a higher rate of all-cause mortality compared to no or mild valvular heart disease (21.6% vs 6.5% per year; aHR 1.55).
Why the study?
Valvular heart disease in non-valvular AF is a puzzling clinical entity, prompting this evaluation of the prognostic effect of significant VHD.
Does the presence of significant valvular heart disease worsen clinical outcomes in patients with non-valvular atrial fibrillation?
Cohort (n=983)
Does the presence of significant valvular heart disease worsen clinical outcomes in patients with non-valvular atrial fibrillation?
Hazard Ratio: 1.55 (95% CI 1.17–2.06)
Absolute Event Rate: 21.6% vs 6.5%
p-value: p=0.02
Significant valvular heart disease is highly prevalent in patients with 'non-valvular' atrial fibrillation and independently predicts increased mortality and heart failure hospitalization, supporting the abandonment of the 'non-valvular' terminology.
Signals elevated mortality risk in non-valvular AF with significant VHD; leaves open whether valve-specific therapies improve survival.
BACKGROUND: Valvular heart disease (VHD) in non-valvular atrial fibrillation (AF) is a puzzling clinical entity. The aim of this study was to evaluate the prognostic effect of significant VHD (sVHD) among patients with non-valvular AF. METHODS: This is a post-hoc analysis of the MISOAC-AF trial (NCT02941978). Consecutive inpatients with non-valvular AF who underwent echocardiography were included. sVHD was defined as the presence of at least moderate aortic stenosis (AS) or aortic/mitral/tricuspid regurgitation (AR/MR/TR). Cox regression analyses with covariate adjustments were used for outcome prediction. RESULTS: In total, 983 patients with non-valvular AF (median age 76 [14] years) were analyzed over a median follow-up period of 32 [20] months. sVHD was diagnosed in 575 (58.5%) AF patients. sVHD was associated with all-cause mortality (21.6%/yr vs. 6.5%/yr; adjusted HR [aHR] 1.55, 95% confidence interval [CI] 1.17-2.06; p = 0.02), cardiovascular mortality (16%/yr vs. 4%/yr; aHR 1.70, 95% CI 1.09-2.66; p = 0.02) and heart failure-hospitalization (5.8%/yr vs. 1.8%/yr; aHR 2.53, 95% CI 1.35-4.63; p = 0.02). The prognostic effect of sVHD was particularly evident in patients aged < 80 years and in those without history of heart failure (p for interaction < 0.05, in both subgroups). After multivariable adjustment, moderate/severe AS and TR were associated with mortality, while AS and MR with heart failure-hospitalization. CONCLUSION: Among patients with non-valvular AF, sVHD was highly prevalent and beared high prognostic value across a wide spectrum of clinical outcomes, especially in patients aged < 80 years or in the absence of heart failure. Predominantly AS, as well as MR and TR, were associated with worse prognosis.
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Samaras et al. (2021) conducted a cohort in Non-valvular atrial fibrillation (n=983). Significant valvular heart disease vs. No or mild valvular heart disease was evaluated on All-cause mortality (aHR 1.55, 95% CI 1.17-2.06, p=0.02). In patients with non-valvular atrial fibrillation, significant valvular heart disease was associated with a higher rate of all-cause mortality compared to no or mild valvular heart disease (21.6% vs 6.5% per year; aHR 1.55).
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