Papers of Herbert Hultgren, cardiologist, mountain climber, researcher in high altitude medicine, and specialist in the study of high altitude pulmonary edema (HAPE). Hultgren and his colleague, Dr. Warren Spickard, were the first to publish a full account of high-altitude pulmonary edema in an English language publication. The papers contain materials related to Hultgren's work in Peru in the early 1960s on HAPE; drafts and production materials for his self-published textbook entitled HIGH ALTITUDE MEDICINE; a complete collection of his reprints; and files related to his important journal articles. The bulk of the collection is concerned with Hultgren's research on high altitude pulmonary edema (HAPE) and preparation of the book HIGH ALTITUDE MEDICINE and contains notebooks, drafts, notes, correspondence, data from experiments and patient observations, and reference articles. Also included are files documenting Hultgren's work on cardiac catheterization and establishment of first catheterization laboratory in Stanford, as well as his observation of cases of severe starvation in concentration camp survivors conducted while he served in Europe with U.S. Medical Corps in the end of the World War II. The papers are arranged in six series: 1) NOTEBOOKS, 2) SUBJECT FILES, 3) JOURNAL ARTICLES, 4) HIGH ALTITUDE MEDICINE - BOOK MATERIALS, 5) MISCELLANEOUS MATERIALS, and 6) REPRINTS.