Implantable cardiac rhythm management devices capable of sensing heart activity and/or providing pacing and/or defibrillating therapy, components of implantable cardiac rhythm devices, devices for assisting in implantation of cardiac rhythm devices

Implantable cardiac rhythm management devices capable of sensing heart activity and/or providing pacing and/or defibrillating therapy, components of implantable cardiac rhythm devices, devices for assisting in implantation of cardiac rhythm devices