What are the conditions that someone has to be in in order to have a cardiac catheterization?

Chest pain / SOB. Cardiac cath is performed for a variety of reasons, but most typically to investigate possibility of plugging of vessels that feed the heart. This is usually manifested by symptoms that suggest a mismatch between oxygen demand of the heart and oxygen supply via the vessels. Chest pain, shortness of breath, intolerance of exertion are the most common symptoms that buy you a ticket to the lab.