title: Progression of Low-Gradient, Low-Flow, Severe Aortic Stenosis With Preserved Left Ventricular Ejection Fraction.
abstract: Low-gradient (LG), low-flow (LF), severe aortic stenosis (AS) with preserved ejection fraction (PEF) is considered by some authors as an advanced form of AS associated with very poor outcome. The aim of this Doppler echocardiographic study was to investigate changes over time in the hemodynamic severity of LG/LF AS with PEF. We retrospectively identified in 2 academic centers 59 patients who had 2 Doppler echocardiographic examinations without an intervening event. After a median follow-up of 2 (interquartile range [IQR] 1.3 to 3.5) years, progression was observed with increase in mean Doppler gradient (MDG; from 27 [23 to 32] to 37 [28 to 44] mm Hg; p <0.001), peak aortic jet velocity (from 330 [314 to 366] to 373 [344 to 423] cm/s; p <0.001), and decrease in aortic valve area (AVA; from 0.73 [0.63 to 0.92] to 0.64 [0.56 to 0.75] cm(2); p = 0.001). Annual rates were, respectively, 8 mm Hg/year, 36 cm/s/year, and -0.04 cm(2)/year. EF decreased from 62% (55% to 69%) to 58% (51% to 65%), p = 0.001. At follow-up, MDG increase was observed in 51 patients (86%), and 24 patients (41%) acquired the features of classical high-gradient (HG) severe AS (MDG ≥40 mm Hg and peak aortic jet velocity ≥400 cm/s). There were no differences as regard to baseline hemodynamic parameters between patients who displayed ≥5 mm Hg MDG increase and those in whom such increase was not observed. In conclusion, most patients with LG/LF AS with PEF exhibit over time increase in MDG and decrease in AVA with slight EF impairment. This result suggests that LG/LF AS with PEF is an intermediate stage between moderate AS and HG AS rather than an advanced form of the disease.
authors.affiliation: Department of Cardiology, University Hospital Amiens, Amiens, France; INSERM U-1088, Jules Verne University of Picardie, Amiens, France. Electronic address: tribouilloy.christophe@chu-amiens.fr.
authors.forename: Christophe
authors.initials: C
authors.lastname: Tribouilloy
authors.affiliation: Department of Cardiology, University Hospital Amiens, Amiens, France; Department of Cardiology, Hospital of Saint Quentin, Saint Quentin, France.
authors.forename: Dan
authors.initials: D
authors.lastname: Rusinaru
authors.affiliation: Department of Cardiology, University Hospital Amiens, Amiens, France.
authors.forename: Vincent
authors.initials: V
authors.lastname: Charles
authors.affiliation: Division of Cardiology, Cliniques Universitaires Saint-Luc, Bruxelles, Belgium.
authors.forename: Jamila
authors.initials: J
authors.lastname: Boulif
authors.affiliation: Division of Cardiology, Cliniques Universitaires Saint-Luc, Bruxelles, Belgium.
authors.forename: Frédéric
authors.initials: F
authors.lastname: Maes
authors.affiliation: Department of Cardiology, University Hospital Amiens, Amiens, France.
authors.forename: Franck
authors.initials: F
authors.lastname: Lévy
authors.affiliation: Division of Cardiology, Cliniques Universitaires Saint-Luc, Bruxelles, Belgium.
authors.forename: Agnès
authors.initials: A
authors.lastname: Pasquet
authors.affiliation: INSERM U-1088, Jules Verne University of Picardie, Amiens, France; Department of Cardiology, Groupement des Hôpitaux de l'Institut Catholique de Lille, Faculté libre de médecine, Université Lille Nord de France, Lille, France.
authors.forename: Sylvestre
authors.initials: S
authors.lastname: Maréchaux
authors.affiliation: Division of Cardiology, Cliniques Universitaires Saint-Luc, Bruxelles, Belgium.
authors.forename: Jean-Louis
authors.initials: JL
authors.lastname: Vanoverschelde
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001024:Aortic Valve Stenosis / Q000000981:diagnostic imaging / Q000503:physiopathology*; D001783:Blood Flow Velocity / Q000502:physiology; D018450:Disease Progression; D015150:Echocardiography, Doppler; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D012189:Retrospective Studies; D012720:Severity of Illness Index; D013318:Stroke Volume / Q000502:physiology*; D013997:Time Factors; D016277:Ventricular Function, Left / Q000502:physiology