If someone has an electrocardiogram, doctors use special equipment to measure the electric currents produced by that person's heart in order to see whether it is working normally.
英汉词典释义
n.
心电图
A electrocardiogram records the heartbeat.心电图上标明心跳次数。
英英词典释义
Noun
1. a graphical recording of the cardiac cycle produced by an electrocardiograph