Electrocardiogram

This is a simple test with attachment of chest and limb electrodes and analysis of the graph that shows the electrical activity of the heart. Diagnosis of myocardial infarction (heart attack), chamber enlargement, heart rhythm abnormalities like heart blocks and atrial fibrillation is possible, including extra beats. Some ECG changes could be due to secondary causes like valve disease, effect of some medications, kidney disease, electrolyte disturbances, etc.