This is the 9747th most frequent Russian word.
экг
"ЭКГ" (Электрокардиограмма) – Electrocardiogram, a test that measures the electrical activity of the heart.
In this sentence, "ЭКГ" denotes the abbreviation for an electrocardiogram, a common application referring to the medical procedure.
Сегодня мне нужно сделать ЭКГ сердца.
Today I need to have a heart ECG done.
Here, "ЭКГ" is used in the context of the medical data/indicator obtained from the procedure.
Доктор расшифровал данные ЭКГ и рассказал о результатах.
The doctor interpreted the ECG data and explained the results.
In this example, "ЭКГ" highlights the use related to the technological equipment integral to capturing electrocardiogram data.