![]() ![]() You carry the device in a pocket or wear it on a belt or shoulder strap. Wires from sensors that stick to the chest connect to a battery-operated recording device. A Holter monitor 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 flows through the heart. This imaging test uses sound waves to create moving pictures of the heart. An ECG can show if the heart is beating too fast or too slowly. Wires connect the electrodes to a computer, which displays or prints the test results. Sticky patches called electrodes are placed on the chest and sometimes the arms and legs. An ECG is a quick and painless test that checks the heartbeat. This complication, called cardiac perforation, is rare.īefore you get an ICD, several tests are done to check your heart health.
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