Medical imaging technique using ultrasound to examine the heart. Often abbreviated as 心エコー in clinical settings.
We examine the heart's movement with echocardiography.
The doctor explained the results of the echocardiography.
General term for ultrasound examination; 心エコー診断 is a specific type focusing on the heart.
Compound of 心 (heart), エコー (echo, from English), and 診断 (diagnosis). A modern medical term.