PT - JOURNAL ARTICLE AU - Leclercq, Christophe TI - Upgrading from right ventricular pacing to biventricular pacing in pacemaker patients with chronic heart failure AID - 10.1136/hrt.2005.065094 DP - 2008 Jan 01 TA - Heart PG - 102--107 VI - 94 IP - 1 4099 - http://heart.bmj.com/content/94/1/102.short 4100 - http://heart.bmj.com/content/94/1/102.full SO - Heart2008 Jan 01; 94