RT Journal Article SR Electronic T1 Pulsatile flow for improved myocardial protection JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 76 OP 77 VO 45 IS 1 A1 Bregman, David YR 1978 UL http://www.ccjm.org/content/45/1/76.abstract AB