On the battlefield and in hospitals around the world, healthcare personnel struggle to assess patients’ cardiac status. While blood pressure and heart rate measurements are routine, there exists a clear need for a non-invasive cardiac monitor that can inform physicians about the effective performance of a patient’s heart. The DARPA Clinic team has developed a conceptual framework for a non-contact device that uses steppedfrequency electromagnetic interrogation to assess cardiac health. Through both analytical modeling and experimental work, the team has explored the feasibility of this novel approach.