Temperature sensors 320 may be thermocouples 322, or thermographic camera sensors 324, or fiber-optic fibers 326 operable to transmit infra-red light from a tissue site to a thermographic camera sensor 324 external to catheter 300, or any other sensor operable to report temperatures in a vicinity of body tissues in proximity to catheter 300, when catheter 300 is inserted in an artery or other body