[Correlation between left ventricular stroke work loss index and aortic valve area in patients with aortic stenosis].
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.


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.
Díaz-Arrieta
Gustavo
G
Servicio de Medicina Interna, Hospital General "Dr. Gaudencio González Garza", Centro Médico Nacional "La Raza", Instituto Mexicano del Seguro Social (IMSS), México, D.F. México. gustavodiazarrieta@yahoo.com
Zamorano-Velázquez
Noé Fernando
NF
Hernández-Martínez
José Gustavo
JG
Martínez-Hernández
Carlos
C
Arenas-Fonseca
Jorge Guillermo
JG
Mendoza-Carmona
Alicia Haydeé
AH
Téllez-Bautista
Margarita
M
Contreras-Rodríguez
Alicia
A
Martínez-Baca-López
Francisco
F
Espinosa-Caleti
Beda
B
Mendoza-Hernández
María Elsa
ME
Sánchez-Velázquez
Luis David
LD
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001021:Aortic Valve / Q000473:pathology*; D001024:Aortic Valve Stenosis / Q000473:pathology* / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012720:Severity of Illness Index; D013318:Stroke Volume