Contribution of ultrasound contrast in predicting conduction disturbances during percutaneous alcohol septal ablation. (6th May 2015) - Ternacle, Julien; Boiron, Philippe; Gallet, Romain; Champagne, Stéphane; Krapf, Laura; Doan, Huy-Long; Randé, Jean-Luc Dubois; Teiger, Emmanuel; Lim, Pascal