It may be able to spot irregular heart rhythms that an ECG missed. A Holter monitor is a small, wearable device that keeps track of the heart rhythm. It shows the size and structure of the heart and how blood is flowing through the heart. This noninvasive test uses sound waves to create pictures of the heart in motion. An ECG can show if the heart is beating too fast, too slow or not at all. Wires connect the electrodes to a computer, which displays the test results. Sticky patches (electrodes) are placed on the chest and sometimes the arms and legs. An ECG is a quick and painless test that measures the electrical signals that make the heart beat. Movement (shifting) of the device or leads, which could lead to cardiac perforation (rare)īefore you get an ICD, your health care provider will order several tests, which may include:.Blood leaking through the heart valve (regurgitation) where the ICD lead is placed.Bleeding around the heart, which can be life-threatening. Possible risks of having an ICD implanted include:
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