Coronary angiography uses flexible, hollow tubes (catheters) and contrast dye to evaluate the heart and blood vessels. Interventional cardiologists use this test to diagnose a wide range of heart problems.
An endomyocardial biopsy (heart biopsy) is a test that evaluates heart tissue for damage or irregularities. It can help to diagnose a range of complex heart conditions or monitor patients after heart transplant.
An intravascular ultrasound (IVUS) is a test to view the heart and blood vessels from the inside of the body. It uses a flexible, hollow tube (catheter) and an ultrasound probe. Cardiologists often use IVUS during other catheterization procedures.