RT Journal Article SR Electronic T1 Assessment of left ventricular function JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 24 OP 27 VO 45 IS 1 A1 Rahimtoola, Shahbudin H. YR 1978 UL http://www.ccjm.org/content/45/1/24.abstract AB