RT Journal Article SR Electronic T1 Cardiac involvement in chronic polymyositis. JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 416 OP 419 DO 10.1136/hrt.33.3.416 VO 33 IS 3 A1 P G Lynch YR 1971 UL http://heart.bmj.com/content/33/3/416.abstract AB