The left ventricle is modelled by a thick-walled spherical shell. Its forced vibration is analyzed numerically by a finite element method in conjunction with the transfer function, i.e., the ratio of the output to input amplitudes. The transfer functions obtained by experiment have single peak and double peaks during 30 and 100 Hz for a normal ventricle and the one with a regional ischemia, respectively. The viscoelastic properties of isolated canine left ventricles are identified by applying a curve fit technique to the transfer function. The dependence of the viscoelastic properties on the left ventricle pressure is investigated, too.
