Anchoring methods, systems and devices anchor an intravascular implantable device within a vessel that is located superior to the heart, i.e. above the heart in a direction toward the head of a patient. A method of providing an intravascular device and instructions for implanting the intravascular device, includes providing an intravascular device having an elongate device body with a proximal end and a distal end that is adapted for chronic implantation within the vasculature of a patient and that includes a distal portion of the intravascular device proximate the distal end of the elongate device body, and providing instructions for chronically implanting the intravascular device substantially wholly within the vasculature of a patient in a target vessel superior to the heart of the patient.
