Big Heart Data is a speculative project exploring cardiac simulation technologies and the potential impact of 3D printing in customizable and personal healthcare. The project sets out to engage non-medical audiences with the latest research around cardiac modeling and surgical planning. Everyone is an individual, and that applies to our internal anatomy too. Recent innovation in imaging and modeling technologies enables medical teams to ‘see’ their patients' unique and individual hearts. Taking this a step further, computer scientists are developing algorithms and computer models to predict the heart’s ‘journey of growth’ from birth to adulthood, allowing them to predict the impact of life conditions and premature birth.