![]() ![]() ![]() Cardiac magnetic resonance imaging (MRI). ![]() A computed tomography (CT) scan uses X-rays to create cross-sectional images of specific parts of your body. The dye helps the arteries show up more clearly on X-ray images and video. Dye flows through the catheter to arteries in the heart. A long, thin flexible tube (catheter) is inserted in a blood vessel, usually in the groin or wrist, and guided to the heart. This test helps health care providers see blockages in the heart arteries. It can show the heart's size and structure. This noninvasive test uses sound waves to create images of the heart in motion. An X-ray image of the chest can show the size and shape of the heart and its blood vessels. Blood tests can be done to check for proteins (enzymes) that leak into the bloodstream when the heart is damaged by a heart attack. If you're having an episode of ventricular fibrillation, the usually shows a heartbeat of about 300 to 400 beats a minute. An electrocardiogram (ECG) can show if the heart is beating too fast or too slowly. 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. This quick and painless test measures the electrical activity of the heart. Tests to diagnose and determine the cause of ventricular fibrillation include: If sudden cardiac death has occurred, a pulse check will reveal no pulse. Ventricular fibrillation is always diagnosed in an emergency situation. ![]()
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