This two piece hollow heart model is derived from a high quality CT scan. The two halves can be kept separate to illustrate anatomy inside the heart, or they can be fused together to make a single piece realistic hollow heart. The cut plane is along the long axis of the heart, which allows for a perfect four-chamber view of the heart. Right and left ventricles, right and left atrium, SVC, IVC, pulmonary arteries and pulmonary veins are present in the model.
I printed this model in Formlabs elastic and fused the two models together to make a single hollow heart model for device testing. Below are some pictures from that project.
Other heart models I have made: