RT Journal Article SR Electronic T1 Prediction of beneficial effect of β blocker treatment in severe ischaemic cardiomyopathy: assessment of global left ventricular ejection fraction using dobutamine stress cardiovascular magnetic resonance JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1471 OP 1472 DO 10.1136/hrt.2004.051425 VO 91 IS 11 A1 T A M Kaandorp A1 H J Lamb A1 J J Bax A1 E Boersma A1 E P Viergever A1 E E van der Wall A1 A de Roos YR 2005 UL http://heart.bmj.com/content/91/11/1471.abstract AB