Stanford Cardiac Arrhythmia Service

Other Tests

Other tests your physician may use to help diagnose arrhythmias include:

Blood tests: We check the level of substances in the blood, such as potassium or thyroid hormone, that can increase your chances of having an arrhythmia.

Chest x-ray: This test can show us whether the heart is enlarged.

Coronary angiography: Coronary angiography uses dye and special x-rays to show the inside of your coronary (heart) arteries.

During the test, the doctor inserts a long, thin, flexible tube called a catheter into a blood vessel in your arm, upper thigh or neck. The tube is then threaded into your coronary arteries, and the dye is injected into your bloodstream. Special x-rays taken while the dye is flowing through the coronary arteries let your doctor study the flow of blood through your heart and blood vessels, and help your doctor find any blockages that can cause a heart attack.

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