RT Journal Article SR Electronic T1 THE SIGNIFICANCE OF ELECTROCARDIOGRAMS SHOWING A “SECOND POSITIVE WAVE OF QRS” IN LEAD III JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 86 OP 96 DO 10.1136/hrt.1.1.86 VO 1 IS 1 A1 Peel, A. A. Fitzgerald YR 1939 UL http://heart.bmj.com/content/1/1/86.abstract AB