A heart phantom assembly comprises a mechanical actuator system comprising a support operatively supporting at least two actuators and a fixing device. A phantom interface is operatively connected to the at least two actuators to be displaceable in at least one translational degree of freedom and at least one rotational degree of freedom as a function of actuation from the at least two actuators. A deformable heart phantom is connected at an end to the phantom interface, and at another end to the fixing device, to be subjected to compression/expansion in response to movements of the phantom interface in the translational degree of freedom, and to torsion in response to movements of the phantom interface in the rotational degree of freedom.
