Valoración cuantitativa de la fracción de eyección y volúmenes de ventrículo izquierdo mediante ecocardiografía tridimensional y speckle tracking y su correlación con la ecocardiografía bidimensional

Abstract

ObjetiveSpeckle tracking (2DSTE) and three-dimensional echocardiography (3DE) are new echocardiographic techniques that have been used for measuring left ventricular ejection fraction and left ventricle volumes. Our aim is to study the correlation between 2DSTE, 3DE and 2DE in calculating the left ejection fraction and ventricular volumes. MethodsWe included 59 patients. Left ventricle ejection fraction and volumes were determined using three techniques. Intra- and interobserver variability of the three techniques were calculated on 15 patients. Results2DE and 2DSTE had good correlation in the measurement of ejection fraction and left ventricle volumes [44±20% (2DE) vs. 36±15% (2DSTE), r=0,78, P<.01], and 2DE with 3DE [45±21% (2DE) vs. 40±16% (2DSTE), r=0.75, P<.01]. There was excellent correlation between the new echocardiographic techniques to determine the ejection fraction (40±16% (2DSTE) vs. 36±15% (3D), r = 0.86, P < 0.01). Intra- and interobserver variability in ejection fraction measurement were 4% and 5% for 2DSTE, and 6% and 4% for 3DE. Conclusions2DSTE and 3DE correlated well with 2DE in determining left ejection fraction and ventricle volumes. There is reduced intra- an interobserver variability between the three techniques.