IPA: /ˌkɑːrdiˈɒɡrəfi/
KK: /kɑrdiˈɑɡrəfi/
A method of recording the heart's movements or functions, often used for medical diagnosis.
The doctor used cardiography to assess the patient's heart health.
Cardiography → It is formed from "cardio-" (from Greek "kardia", meaning heart) and "-graphy" (from Greek "grapho", meaning to write or record). The word refers to the process of recording the heart's activity.
Think of 'heart' ('cardio-') being 'written down' or 'recorded' ('-graphy') — that's what cardiography means.