1. First-phase left ventricular ejection fraction: a small step for myocardial assessment, a big leap for aortic stenosis
- Author
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Julien Magne, Victor Aboyans, Clinical sciences, Neuroépidémiologie Tropicale (NET), CHU Limoges-Institut d'Epidémiologie Neurologique et de Neurologie Tropicale-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Génomique, Environnement, Immunité, Santé, Thérapeutique (GEIST), Université de Limoges (UNILIM)-Université de Limoges (UNILIM), Service de cardiologie [CHU Limoges], CHU Limoges, Plate forme de bioinformatique et biostatistique (CEBIMER), and Institut Génomique, Environnement, Immunité, Santé, Thérapeutique (GEIST)
- Subjects
medicine.medical_specialty ,Aortic Valve Stenosis/diagnostic imaging ,Aortic Valve Insufficiency ,030204 cardiovascular system & hematology ,03 medical and health sciences ,0302 clinical medicine ,Phase (matter) ,Internal medicine ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,AcademicSubjects/MED00200 ,030212 general & internal medicine ,ejection fraction ,ComputingMilieux_MISCELLANEOUS ,MESH: Aortic Valve Stenosis ,MESH: Humans ,Ejection fraction ,business.industry ,aortic stenosis ,MESH: Aortic Valve Insufficiency ,General Medicine ,Aortic Valve Stenosis ,medicine.disease ,myocardial function ,Stenosis ,arterial stiffness ,Cardiology ,[SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie ,Original Article ,business ,Cardiology and Cardiovascular Medicine - Abstract
Aims First-phase ejection fraction (EF1), the EF at the time to peak aortic jet velocity, has been proposed as a novel marker of peak systolic function in aortic stenosis (AS). This study aimed to explore the association of myocardial contractility and arterial load with EF1 in AS patients. Methods and results Data from a prospective, cross-sectional study of 114 patients with mild, moderate, and severe AS with preserved left ventricular EF (>50%) were analysed. EF1 was measured as the volume change from end-diastole to the time that corresponded to peak aortic jet velocity. Myocardial contractility was assessed by strain rate measured by speckle tracking echocardiography. Arterial stiffness was assessed by central pulse pressure/stroke volume index ratio (PP/SVi). The total study population included 48% women, median age was 73 years, and mean peak aortic jet velocity was 3.47 m/s. In univariable linear regression analyses, lower EF1 was associated with higher age, higher peak aortic jet velocity, lower global EF, lower global longitudinal strain, lower strain rate, and higher PP/SVi. There was no significant association between EF1 and heart rate or sex. In multivariable linear regression analysis, EF1 was associated with lower strain rate and higher PP/SVi, independent of AS severity. Replacing PP/SVi by valvular impedance did not change the results. Conclusion In patients with AS, reduced myocardial contractility and increased arterial load were associated with lower EF1 independent of the severity of valve stenosis.
- Published
- 2020
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