ECG is one of the most common clinical examinations, and it is widely used. Applications include:
1. Record electrical activity of normal human heart.
2. Help diagnose arrhythmia.
3. Help diagnose myocardial ischemia, myocardial infarction, and determine the location of myocardial infarction.
4. Diagnose cardiac enlargement and hypertrophy.
5. Determine the effect of the drug or electrolyte on the heart.
6. Determine the condition of artificial cardiac pacing.