The 1950s were busy years for innovation and research. The first Board of Governors was appointed, which provided physician leadership and a stable foundation for administration that continues to this day. A small but remarkable group of surgeons and cardiologists began to gather at Cleveland Clinic and address the diseases of the heart. One of the most dramatic breakthroughs in the history of heart care occurred at Cleveland Clinic in 1958 — the discovery of modern coronary angiography, still the gold standard for diagnosing coronary artery disease.