Interventional cardiology uses catheters to diagnose and treat heart disease. Catheters are very small tubes (similar to IVs) that healthcare providers put through your blood vessels.
Healthcare providers working in this type of cardiology help people with vascular (blood vessel) and coronary (heart) diseases. They also help people who have structural heart disease. These diseases include heart valve defects and septal defects — abnormalities in the walls separating your heart chambers.