RT Journal Article SR Electronic T1 Echocardiography in patients with coronary artery disease JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 17 OP 18 VO 45 IS 1 A1 Feigenbaum, Harvey YR 1978 UL http://www.ccjm.org/content/45/1/17.abstract AB