Abstract
Retrospective studies have suggested that patients with a low transvalvular gradient in the presence of an aortic valve area <1.0 cm² and normal ejection fraction may represent a subgroup with an advanced stage of aortic valve disease, reduced stroke volume, and poor prognosis requiring early surgery. We therefore evaluated the outcome of patients with low-gradient "severe" stenosis (defined as aortic valve area <1.0 cm² and mean gradient = 40 mm Hg) in the prospective Simvastatin and Ezetimibe in Aortic Stenosis (SEAS) study.
Methods and Results—Outcome in patients with low-gradient “severe” aortic stenosis was compared with outcome in
patients with moderate stenosis (aortic valve area 1.0 to 1.5 cm2; mean gradient 25 to 40 mm Hg). The primary end point
of aortic valve events included death from cardiovascular causes, aortic valve replacement, and heart failure due to aortic
stenosis. Secondary end points were major cardiovascular events and cardiovascular death. In 1525 asymptomatic
patients (mean age, 6710 years; ejection fraction, 55%), baseline echocardiography revealed low-gradient severe
stenosis in 435 patients (29%) and moderate stenosis in 184 (12%). Left ventricular mass was lower in patients with
low-gradient severe stenosis than in those with moderate stenosis (18264 versus 21268 g; P0.01). During 46
months of follow-up, aortic valve events occurred in 48.5% versus 44.6%, respectively (P0.37; major cardiovascular
events, 50.9% versus 48.5%, P0.58; cardiovascular death, 7.8% versus 4.9%, P0.19). Low-gradient severe stenosis
patients with reduced stroke volume index (35 mL/m2; n223) had aortic valve events comparable to those in patients
with normal stroke volume index (46.2% versus 50.9%; P0.53).
Conclusions—Patients with low-gradient “severe” aortic stenosis and normal ejection fraction have an outcome similar to
that in patients with moderate stenosis.
Methods and Results—Outcome in patients with low-gradient “severe” aortic stenosis was compared with outcome in
patients with moderate stenosis (aortic valve area 1.0 to 1.5 cm2; mean gradient 25 to 40 mm Hg). The primary end point
of aortic valve events included death from cardiovascular causes, aortic valve replacement, and heart failure due to aortic
stenosis. Secondary end points were major cardiovascular events and cardiovascular death. In 1525 asymptomatic
patients (mean age, 6710 years; ejection fraction, 55%), baseline echocardiography revealed low-gradient severe
stenosis in 435 patients (29%) and moderate stenosis in 184 (12%). Left ventricular mass was lower in patients with
low-gradient severe stenosis than in those with moderate stenosis (18264 versus 21268 g; P0.01). During 46
months of follow-up, aortic valve events occurred in 48.5% versus 44.6%, respectively (P0.37; major cardiovascular
events, 50.9% versus 48.5%, P0.58; cardiovascular death, 7.8% versus 4.9%, P0.19). Low-gradient severe stenosis
patients with reduced stroke volume index (35 mL/m2; n223) had aortic valve events comparable to those in patients
with normal stroke volume index (46.2% versus 50.9%; P0.53).
Conclusions—Patients with low-gradient “severe” aortic stenosis and normal ejection fraction have an outcome similar to
that in patients with moderate stenosis.
| Originalsprog | Engelsk |
|---|---|
| Tidsskrift | Circulation |
| Vol/bind | 123 |
| Udgave nummer | 8 |
| Sider (fra-til) | 887-895 |
| Antal sider | 9 |
| ISSN | 0009-7322 |
| DOI | |
| Status | Udgivet - 1 mar. 2011 |