PT - JOURNAL ARTICLE AU - J G F Cleland AU - D Cullington AU - A Tageldien Abdellah TI - Cardiac resynchronisation therapy upgrade and occurrence of ventricular arrhythmia AID - 10.1136/hrt.2008.145078 DP - 2008 Jun 01 TA - Heart PG - 793--793 VI - 94 IP - 6 4099 - http://heart.bmj.com/content/94/6/793.1.short 4100 - http://heart.bmj.com/content/94/6/793.1.full SO - Heart2008 Jun 01; 94