-graphy is a suffix for the process of making a recording or image (EKG or ECG). The electr/o/cardi/o/gram is a record obtained by the process of electr/o/cardi/o/ graphy. A technologist can learn...

-graphy is a suffix for the process of making a recording or image (EKG or ECG). The electr/o/cardi/o/gram is a record obtained by the process of electr/o/cardi/o/ graphy. A technologist can learn electrocardiography, but it takes a cardiologist to read the ________________________.

NOTE: The suffix -gram refers to the actual paper readout or picture on a computer screen. Think of obtaining a telegram from a telegraph.