Prognosis of Angina Pectoris

In 1946, Parker and co-workers1reported observations on 3,440 patients with angina pectoris seen at Mayo Clinic from Jan. 1, 1927, through Dec. 31, 1936. Their report dealt essentially with survival rates. Because of the wide interest evoked by that report, we are reporting further follow-up studies on these patients and observations on an additional 3,442 patients with angina pectoris seen at this clinic during the subsequent 8 years, the minimal follow-up period being 5 years. There have been few reports of long term observations on large groups of patients with angina pectoris. Some reports have included only those patients dead at the time of the report. In 1910, Herrick and Nuzum2reported on 200 patients. One fourth of these were dead, the disease having lasted on the average slightly less than 3 years. No follow-up information on the living patients was reported. Mackenzie3observed 380 patients