PT - JOURNAL ARTICLE ED - , TI - Heart Review series AID - 10.1136/hrt.2005.078188 DP - 2006 Jan 01 TA - Heart PG - 7--7 VI - 92 IP - 1 4099 - http://heart.bmj.com/content/92/1/7.1.short 4100 - http://heart.bmj.com/content/92/1/7.1.full SO - Heart2006 Jan 01; 92