Dynamic Piston Function of the Mitral Annulus to Assess Early Left Ventricular Diastolic Filling: A Proof of Concept Study

Autor: Dagmar F. Hernandez-Suarez, Francisco López Menéndez, Angel López-Candales
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: Cardiology and Therapy, Vol 8, Iss 1, Pp 129-134 (2019)
Druh dokumentu: article
ISSN: 2193-8261
2193-6544
DOI: 10.1007/s40119-019-0130-9
Popis: Abstract Introduction Early left ventricular (LV) filling has been described as an asymmetric toroidal vortex ring of blood entering the LV upon opening of the mitral valve. This phenomenon is in part responsible for cyclical changes in LV volumes during the cardiac cycle and also contributes to the apical and basal longitudinal displacements of the mitral annulus (MA). Although MA early diastolic (e’) velocities have been used to assess early LV filling characteristics, accurate distinction between normal aging and pathological diastolic dysfunction (DD) might be challenging at times. Methods In this pilot study, echocardiographic data from 60 consecutive patients were reviewed. The studied population was allocated into three groups based on the new American Society of Echocardiography guidelines for diastolic dysfunction classification. To better define LVDD, we based our interpretation of MA tissue Doppler imaging (TDI) signals on the well-described displacement pump mechanism of the MA plane functioning as a piston unit. Results Patients with normal diastolic function were younger (50 ± 14 years) than those with DD (group II: 69 ± 8 and group III: 63 ± 17 years) (p
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