The graphic recording of the movement, or other function of the heart as a means of diagnosis(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "cardiography" in a sentence
"University of Lund at this time was the ultrasonar cardiography, developed by Helmuth Hertz and Inge Edler."
"Exhibits of original galvanometers and other apparatus will trace the development of cardiography."
"About SonoSite, Inc. SonoSite, Inc. (www. sonosite.com), is the innovator and world leader in hand-carried ultrasound and industry leader in impedance cardiography equipment."