Based on the real life of Dr Kathy Magliato, `Heartbeat' focuses on outspoken and high-achieving heart-transplant surgeon Dr Alex Panttiere, who is a beautiful woman in a field dominated by men. Bold and stubborn, Alex does things on her own terms, celebrating her racy - and complicated - personal life and successfully managing the day-to-day demands of faculty members and interns who remain sceptical, while still finding time to impress by pushing the boundaries of medical science.