This past summer, a team of Rensselaer Polytechnic Institute students, with the guidance of a faculty mentor, pitched a winning design for a wearable, medical-grade device that monitors for atrial fibrillation. Atrial fibrillation, or A-fib, is a potentially life-threatening heart condition that will affect an estimated 12 million people in the U.S. by 2030, according to the Centers for Disease Control and Prevention.