M
Michael A. Heymann
Researcher at University of California, San Francisco
Publications - 196
Citations - 15933
Michael A. Heymann is an academic researcher from University of California, San Francisco. The author has contributed to research in topics: Ductus arteriosus & Fetus. The author has an hindex of 62, co-authored 196 publications receiving 15633 citations. Previous affiliations of Michael A. Heymann include Helsinki University Central Hospital & Indiana University.
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Journal ArticleDOI
Blood flow measurements with radionuclide-labeled particles.
TL;DR: The microsphere technique is relatively simple and extremely accurate when appropriately and correctly applied, and it can be used to quantify arteriovenous anastomoses as well as the measurement of organ blood flows and distribution of blood flow within those organs.
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The Circulation of the Fetus in Utero METHODS FOR STUDYING DISTRIBUTION OF BLOOD FLOW, CARDIAC OUTPUT AND ORGAN BLOOD FLOW
TL;DR: Experimental evidence is provided that (1) there is no significant recirculation of microspheres, (2) the distribution of spheres is proportional to flow, and (3) circulatory physiology is not altered by injection of spheres.
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Cardiovascular responses to hypoxemia and acidemia in fetal lambs.
TL;DR: The studies quantitate the fetal circulatory changes that occur in unanesthetized fetal lambs in utero during maternal hypoxemia and acidemia.
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Inhaled Nitric Oxide and Persistent Pulmonary Hypertension of the Newborn
Jesse D. Roberts,Jeffrey R. Fineman,Frederick C. Morin,Philip W. Shaul,Stephen Rimar,Michael D. Schreiber,Richard A. Polin,Maurice S. Zwass,Michael M. Zayek,Ian Gross,Michael A. Heymann,Warren M. Zapol,Kajori G. Thusu,Thomas M. Zellers,Mark E. Wylam,Alan M. Zaslavsky +15 more
TL;DR: Inhaled nitric oxide improves systemic oxygenation in infants with persistent pulmonary hypertension and may reduce the need for more invasive treatments.
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Circulatory Changes during Growth in the Fetal Lamb
TL;DR: The studies suggest that, since lung blood flow is a relatively small proportion of total cardiac output, it is not important in regulating distribution of blood flow, but that the peripheral circulation in skin and muscle is the site where vasomotor responses may effect major redistribution of the fetal circulation.