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(Circulation. 1964;30:188.)
© 1964 American Heart Association, Inc.

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Effect of Transseptal Left Atrial Puncture upon Cardiac Output

PHILIP SAMET M.D.¹; WILLIAM H. BERNSTEIN M.D.¹; AARON MEDOW M.D.¹

¹ From the Cardio-Pulmonary Laboratory, Mount Sinai Hospital, Miami Beach, and the Section of Cardiology, University of Miami School of Medicine, Coral Gables, Florida.

Comparisons of cardiac index, mean transit time, and "pulmonary" blood volume were made with indocyanine green dilution curves before and after transseptal left atrial puncture in 105 patients in sinus rhythm and 52 with atrial fibrillation. The results demonstrated that the steady state was not disturbed by transseptal left heart catheterization.