Media type: E-Article Title: 44 Signal-to-Noise Ratio During Haemodynamic Optimisation of AV Delay is Improved more by Atrial Pacing than by Increasing Heart Rate Contributor: Sharp, Alexander; Sohaib, Afzal; Willson, Keith; Mayet, Jamil; Hughes, Alun; Kanagaratnam, Prapa; Whinnett, Zachary; Kyriacou, Andreas; Francis, Darrel imprint: BMJ, 2015 Published in: Heart Language: English DOI: 10.1136/heartjnl-2015-308066.44 ISSN: 1355-6037; 1468-201X Keywords: Cardiology and Cardiovascular Medicine Origination: Footnote: