Effects of chordal disruption on regional left ventricular torsional deformation.

Abstract

Sham operation and anterior chordal-sparing MVR did not affect regional LV torsion; however, loss of normal valvular-ventricular integrity with conventional MVR reduced regional LV systolic torsion in the anterior and lateral LV regions. Posterior chordal-sparing MVR impaired torsion only after calcium administration. The deleterious effects of chordal excision may be due in part to perturbation of regional systolic torsional deformation.