Markers of Elevated Left Ventricular Filling Pressure Are Associated with Increased Mortality in Nonsevere Aortic Stenosis - 03/05/21
, Sally Burrows, BMath, GradDipMedStat b, d, David Playford, MBBS, PhD, FESC, FACC c, Geoff Strange, PhD c, Graham Hillis, BMedBiol, MBChB, PhD a, bAbstract |
Background: Echocardiographic measures of elevated left ventricular filling pressures are associated with an adverse prognosis. The aim of this study was to determine the relationship between acute (ratio of early transmitral flow to mitral annular velocity [E/e′]) and chronic (indexed left atrial volume) markers of left ventricular filling pressure and mortality in patients with nonsevere aortic stenosis (AS), within the National Echo Database Australia cohort, testing the hypothesis that they would reflect the early hemodynamic consequences of AS and be associated with increased mortality in this setting.
Methods |
The first record for patients ≥18 years of age showing hemodynamically significant but nonsevere (mild or moderate) AS (mean pressure gradient ≥ 10 to <40 mm Hg and aortic valve area > 1 cm2) was analyzed. Baseline demographics and echocardiographic variables were compared with those among patients without AS (mean pressure gradient < 10 mm Hg). Mortality linkage data were available for all patients.
Results |
Of 78,886 patients with aortic valve mean pressure gradients < 40 mm Hg and aortic valve areas > 1 cm2, 13,768 (17%) were identified with nonsevere AS (aortic valve mean pressure gradient 10–40 mm Hg), of whom 57% were men (mean age, 73 ± 13.4 years) with a median follow-up of 3.4 years (interquartile range, 1.7–6.1 years). In unadjusted time-varying coefficient models, nonsevere AS and indexed left atrial volume > 34 mL/m2 (hazard ratio [HR], 2.29; 95% CI, 2.03–2.58), E/e′ ratio > 14 (HR, 2.27; 95% CI, 2.08–2.49), left ventricular ejection fraction < 50% (HR, 2.82; 95% CI, 2.50–3.19), and tricuspid regurgitation peak velocity > 280 cm/sec (HR, 2.54; 95% CI, 2.30–2.80) were associated with increased mortality hazard at the time of echocardiography. All markers were significant when combined in a multivariate model.
Conclusions |
Indices of elevated left ventricular filling pressure are independently associated with death in patients with nonsevere AS. Risk stratification models incorporating these variables may identify patients at risk for complications, warranting closer surveillance and possibly earlier intervention.
Le texte complet de cet article est disponible en PDF.Highlights |
• | Patients with nonsevere AS have elevated echocardiographic markers of LVFP. |
• | These markers are independently associated with increased mortality in these patients. |
• | This may help identify high-risk subgroups that may benefit from closer surveillance. |
Keywords : Echocardiography, Observational, Aortic stenosis, Left ventricular filling pressure, Mortality
Abbreviations : AS, AV, AVA, AVR, HR, LAVI, LVEF, LVFP, NEDA, TR
Plan
| The National Echo Database Australia was originally established with funding support from Actelion Pharmaceuticals, Bayer Pharmaceuticals, and GlaxoSmithKline and is supported by the National Health and Medical Research Council of Australia (1055214). |
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| Dr. Strange has received consulting fees from Edwards Lifesciences and has been invited speak to an international medical advisory board for Edwards Lifesciences. |
Vol 34 - N° 5
P. 465-471 - mai 2021 Retour au numéro
Article précédent
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