PT - JOURNAL ARTICLE AU - Aapo L Aro TI - First-degree atrioventricular block: risk marker or innocent finding? AID - 10.1136/heartjnl-2015-309256 DP - 2016 May 01 TA - Heart PG - 655--656 VI - 102 IP - 9 4099 - http://heart.bmj.com/content/102/9/655.short 4100 - http://heart.bmj.com/content/102/9/655.full SO - Heart2016 May 01; 102