A diagnostic procedure in which a thin tube is guided into the heart under x-ray guidance after being inserted into a vein or artery is a(n):

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This procedure is known as a cardiac catheterization. A coronary angiogram is a type of cardiac catheterization that specifically looks at the arteries supplying blood to the heart. A holter monitor is a wearable device that records the heart's electrical activity over a period of time, and nuclear imaging uses small amounts of radioactive material to produce images of the heart. An electrocardiogram (ECG or EKG) records the heart's electrical activity through electrodes placed on the skin, but does not involve inserting a tube into the heart.

A Diagnostic Procedure in Which a Thin Tube Is Guided