Boston Scientific Corp. has announced the commencement of the use of its Cognis cardiac resynchronization therapy defibrillator (CRT-D) and Teligen implantable cardioverter defibrillator (TM-ICD) by European doctors. Both these cardiac rhythm management devices received the CE Mark approval in January and are awaiting approval in the US. These are among the smallest and thinnest high-energy devices in the world and offer improved battery life and self-rectifying software.