Improvement in Coronary Blood Flow Velocity With Acute Biventricular Pacing Is Predominantly Due to an Increase in a Diastolic Backward-Travelling Decompression (Suction) Wave - Kyriacou, A; Whinnett, ZI; Sen, S; Pabari, PA; Wright, I; Cornelussen, R; Lefroy, D; Davies, DW; Peters, NS; Kanagaratnam, P; Mayet, J; Hughes, AD; et al. (CIRCULATION, 2012)