The Polymer Technology Group (PTG) indicated that its customer, Sunshine Heart Inc., has passed the five-year milestone on durability-testing of its C-Pulse implantable heart assist device. C-Pulse is designed to be a non-blood-contacting heart assist therapy for treating patients with moderate to severe heart failure, a condition in which the heart progressively loses its ability to efficiently pump blood throughout the body. C-Pulse includes two polymers from PTG.