RT Journal Article SR Electronic T1 Delayed protection against ventricular arrhythmias by cardiac pacing JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 423 OP 425 DO 10.1136/hrt.78.5.423 VO 78 IS 5 A1 JAMES R PARRATT A1 AGNES VEGH YR 1997 UL http://heart.bmj.com/content/78/5/423.abstract AB