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Electrocardiography (ECG)

An Electrocardiography (ECG) is the recording of the electrical activity of your heart by attaching electrodes to your chest.

 

It produces a pattern reflecting the electrical activity of the heart and usually requires a doctor to interpret it in the context of the signs and symptoms you present with. It can give information regarding the rhythm of your heart, whether that impulse is conducted normally throughout your heart, or whether any part of your heart is contributing more or less than expected to the electrical activity of your heart. It can also give information regarding the balance of salts (electrolytes) in your blood.

 

It is one of the key tests performed when a heart attack is suspected; the ECG can identify whether the heart muscle has been damaged in specific areas, though not all areas of your heart are covered. However, the ECG cannot reliably measure the pumping ability of your heart, for which ultrasound-based Echocardiography is used.

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