definiens: means the research, developme nt, manufacture, use, sale, promotion, distribution and importation of medical devices and systems for intravascular approaches for the diagnosis and/or treatment of cardiovascular, neuro vascular, and peripheral vascular diseases, wherein the distal end of the medical device or sys tem, after entering a blood vessel, remains within the blood vessel or branches of the blood vessel fo r the delivery of the diagnostic or therapeutic modality for which the device or system is being us ed . For clarity, as used in this Section 1.10 and i n Section 1.18, and terms containing mean blood vessel ( artery, arteriole, vein, venule, or capillary ) . The Parties agree that means navigating inside a blood vessel ; means a dise ase, deformity, or injury inside or to the heart or inside or to the blood vessels that transport blood to and from the heart muscle ; means a disease, deformity, or injury insi de or to the blood vessels that transport blood to and from the brain ; and means a disease, deformity, or injury inside or to blood vessels . The Parties agree that performing diagnosis and/or treatment in an interior chamber of the heart is considered to be within the Hansen Field of Use if entry into the heart is made by intravascular approach