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(Circulation. 1958;18:60.)
© 1958 American Heart Association, Inc.

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Steady-State Cardiac Output Determination During Combined Right and Left Heart Catheterization

PHILIP SAMET M.D.¹; WILLIAM H. BERNSTEIN M.D.¹; ROBERT S. LITWAK M.D.¹; H. TURKEN M.D.¹; LEONARD SILVERMAN M.D.¹

¹ From the Cardio-Pulmonary Laboratory, Mt. Sinai Hospital, Miami Beach, Florida, and the Section of Cardiology, Department of Medicine, and the Department of Surgery, University of Miami School of Medicine, Coral Gables, Florida, and Jackson Memorial Hospital, Miami, Florida, and the Howard Hughes Medical Institute, Miami, Florida.

Interpretation of the meaning of a mean diastolic atrioventricular gradient or a mean systolic ventricular-great vessel gradient requires simultaneous determination of the level of the gradient, the heart rate, and the cardiac output. The feasibility of steady-state Fick principle cardiac output determination during combined right and left heart catheterization is investigated.