RT Journal Article SR Electronic T1 Cardiac rehabilitation improved exercise tolerance after a myocardial infarction in older patients JF Evidence Based Nursing JO Evid Based Nurs FD BMJ Publishing Group Ltd and RCN Publishing Company Ltd SP 20 OP 20 DO 10.1136/ebn.7.1.20 VO 7 IS 1 YR 2004 UL http://ebn.bmj.com/content/7/1/20.abstract AB