Computer assessment and modelling of left heart ventricle contractility based on kinetic model

Ventricles' contractility is one of basic indicators of heart function. A Fourier spectrum of the function describing the variations of left chamber's shape contains a useful diagnostic information about sector and time contractility pathologies. An examination of regional ventricles' contractility leads to the detection of local cardiac dysfunctions like wall motion akinesis, diskinesis or hypokinesis. The authors present a mathematical model of left chamber shape variations within a single heart-beating cycle. The model is given in its direct and incremental forms. The methods of model coefficients evaluation based on the investigation of a series of cardiac images is described.