[′kärd·ē·ə‚skōp] (medicine) An instrument for the examination or visualization of the interior of the cardiac chambers.An instrument which, by means of a cathode-ray oscillograph, projects an electrocardiographic record on a luminous screen.
cardioscope
car·di·o·scope
(kar'dē-ō-skōp), An instrument for inspecting the interior of the living heart. [cardio- + G. skopeō, to view]