RT Journal Article SR Electronic T1 VENTRICULAR PARASYSTOLE WITH SLOW MANIFEST ECTOPIC DISCHARGE JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 731 OP 737 DO 10.1136/hrt.24.6.731 VO 24 IS 6 A1 Schamroth, L. YR 1962 UL http://heart.bmj.com/content/24/6/731.abstract AB