Correlación entre el índice de pérdida de trabajo-latido ventricular izquierdo y el área valvular aórtica en pacientes con estenosis aórtica / Correlation between left ventricular stroke work loss index and aortic valve area in patients with aortic stenosis
Díaz-Arrieta, Gustavo; Zamorano-Velázquez, Noé Fernando; Hernández-Martínez, José Gustavo; Martínez-Hernández, Carlos; Arenas-Fonseca, Jorge Guillermo; Mendoza-Carmona, Alicia Haydeé; Téllez-Bautista, Margarita; Contreras-Rodríguez, Alicia; Martínez-Baca-López, Francisco; Espinosa-Caleti, Beda; Mendoza-Hernández, María Elsa; Sánchez-Velázquez, Luis David.
Arch. cardiol. Méx
; 79(2): 121-126, abr.-jun. 2009. tab, ilus
Artículo
en Español
| LILACS | ID: lil-565722
In echocardiographic evaluation of patients with aortic stenosis (AS), prospective studies have demonstrated that left ventricular stoke work loss index (LVSWLI) provide a more clinical efficacy than calculate of aortic valve area (AVA) by continuity equation to estimate severity of stenosis. The aim of this study was assess in our population of patients with AS the correlation between LVSWLI and AVA in regard to severity. MATERIAL AND
METHODS:
Forty nine patients with moderate and severe AS were evaluated by transthoracic echocardiography. Grades of AS were assessed by transaortic flow velocity (Vmax) and mean aortic transvalvular gradient (deltaP). AVA and LVSWLI were calculated and Pearson's and Spearman's correlation coefficients between both methods were assessed. Significance level was set at <0.05.RESULTS:
The age of the patients was 66 +/- 13 (31-84 years). Thirty four (69%) patients had severe AS and 15 (31%) moderate AS. The Pearson's correlation coefficient between LVSWLI and AVA was 0.79 (p<0.04) and between LVSWLI and deltaP was 0.90 (p<0.03). The Spearman's correlation coefficient between LVSWLI and symptomatic status was 0.70 (rho = 0.70, p < 0.003).CONCLUSIONS:
In patients with moderate and severe AS, the correlation between LVSWLI and deltaP is higher than correlation between LVSWLI and AVA. Moreover LVSWLI has a higher correlation with presence of symptoms than AVA.
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