Normal Results
- Heart rate: 60 to 100 beats per minute
- Heart rhythm: consistent and even
What Abnormal Results Mean
Abnormal ECG results may be a sign of:
- Damage or changes to the heart muscle
- Changes in the amount of sodium or potassium in the blood
- Congenital heart defect
- Enlargement of the heart
- Fluid or swelling in the sac around the heart
- Inflammation of the heart (myocarditis)
- Past or current heart attack
- Poor blood supply to the heart arteries
- Abnormal heart rhythms (arrhythmias)
Some heart problems that can lead to changes on an ECG test include: 
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