The present application describes an intravascular implantable pacing and/or defibrillation system. The described system includes a pulse generator that is implantable within a blood vessel and proportioned to blood flow through the blood vessel, and at least one electrode attachable to the pulse generator....http://www.google.com/patents/US7899554?utm_source=gb-gplus-sharePatent US7899554 - Intravascular System and Method
