Transmural myocardial deformation in the canine left ventricular wall

Abstract

A biplane cineradiographic technique was used to measure deformation of the myocardium as indicated by small Pb spheres implanted into the anterior left ventricular wall of anesthetized dogs. Deformation was resolved into 9 separate components for the epicardial, middle and endocardial layers. The data illustrate the mechanical effect of myocardial fiber orientation and the ability of muscle layers to deform differentially. To present an overview of all the results, the implications of the deformation components are discussed separately and then in a coordinated fashion.