During the original show up through the 1970s, the show primarily covered Dr. Steve Hardy (John Beradino) and his friend, Nurse Jessie Brewer (Emily McLaughlin).
A biopsy is the removal of a sample of tissue or cells so that they can be examined by a pathologist, usually under a microscope. A specialist trained to examine a sample of tissue for signs and extent of disease under a microscope is called a pathologist.
A heart biopsy, also called myocardial biopsy or cardiac biopsy, is an invasive procedure to detect heart disease. It entails using a bioptome (a small catheter with a grasping device on the end) to obtain a small piece of heart muscle tissue that is sent to a laboratory for analysis.