CARDIOGRAPHY
cardiography, electrocardiography
(noun) diagnostic procedure consisting of recording the activity of the heart electronically with a cardiograph (and producing a cardiogram)
Source: WordNet® 3.1
Etymology
Noun
cardiography (countable and uncountable, plural cardiographies)
(medicine) The graphic recording of the movement, or other function of the heart as a means of diagnosis
Source: Wiktionary
Car`di*og"ra*phy, n.
1. Description of the heart.
2. (Physiol.) Examination by the cardiograph.
Source: Webster’s Unabridged Dictionary 1913 Edition