ech·o·car·di·og·ra·phy 
(ĕk′ō-kär′dē-ŏgrə-fē)
(ĕk′ō-kär′dē-ŏgrə-fē)n.
The use of ultrasound to record and produce a two-dimensional real-time display of the size, motion, and structure of various components of the heart.
ech′o·car′di·o·graphic adj.