Normal and shear strains of the left ventricle in healthy human subjects measured by two-dimensional speckle tracking echocardiography.

ABSTRACT:

Background

Animal studies have shown that shear deformation of myocardial sheets in transmural planes of left ventricular (LV) wall is an important mechanism for systolic wall thickening, and normal and shear strains of the LV free wall differ from those of the interventricular septum (IVS). We sought to test whether these also hold for human hearts.

Methods

Thirty healthy volunteers (male 23 and female 7, aged 34 ± 6 years) from Outpatient Department of the University of Tokyo Hospital were included. Echocardiographic images were obtained in the left decubitus position using a commercially available system (Aloka SSD-6500, Japan) equipped with a 3.5-MHz transducer. The ECG was recorded simultaneously. The peak systolic radial normal strain (length change), shear strain (ang

SUBMITTER: Yuan LJ 

PROVIDER: S-EPMC4016487 | biostudies-literature | 2014 Feb

REPOSITORIES: biostudies-literature