RT Journal Article SR Electronic T1 Arterial and Venous Pressure Readings During Open-Heart Operations JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 45 OP 47 VO 31 IS 1 A1 Donald E. Hale YR 1964 UL http://www.ccjm.org/content/31/1/45.abstract AB