Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography
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J Am Soc Echocardiogr · Apr 2012
The incremental value of valvuloarterial impedance in evaluating the results of transcatheter aortic valve implantation in symptomatic aortic stenosis.
Valvuloarterial impedance (Z(va)) can estimate the global hemodynamic load on the left ventricle in patients with severe aortic stenosis better than the standard indexes, as shown in previous studies. In fact, Z(va) can estimate global left ventricular hemodynamic load as the sum of valvular and vascular loads. The aim of this study was to evaluate the acute improvement of left ventricular performance in patients with symptomatic aortic stenosis after transcatheter aortic valve implantation (TAVI) using Z(va). ⋯ TAVI is characterized by an immediate enhancement of global left ventricular hemodynamic performance, as demonstrated by an acute Z(va) improvement, even in patients with low baseline ejection fractions.