RT Journal Article SR Electronic T1 VENTRICULAR PARASYSTOLIC TACHYCARDIA JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 392 OP 400 DO 10.1136/hrt.27.3.392 VO 27 IS 3 A1 Koo-Young Chung A1 Thomas J. Walsh A1 Edward Massie YR 1965 UL http://heart.bmj.com/content/27/3/392.abstract AB