Abstract: The dynamic simulation of cardiac ultrasound is a crucial and challenging task. In this paper, a three-dimensional cardiac animation model reconstructed from computed tomography(CT) data is utilized. Ray tracing and ultrasound Doppler techniques are employed for the computational simulation of cardiac motion. Subsequently, the animation sequences are cached on the graphics processing unit(GPU) to achieve real-time dynamic simulation of cardiac ultrasound. The experimental results show that with 512 rays and an ultrasound image resolution of 145 μm, the model, which consists of over 200,000 triangular facets, is able to generate dynamic ultrasound images at a rate exceeding 20 frames per second. Meanwhile, ultrasound Doppler simulation is realized through the ray tracing method, which verifis the feasibility of using scattering technology to achieve ultrasound Doppler simulation.