The Role of Echocardiography and Utility of Second-generation Contrast Agents in the Assessment of Apical Hypertrophic Cardiomyopathy and Coronary Artery-left Ventricular Fistulae - Benjamin, A.; Sedgwick, J.; Burstow, D.; West, C.; Boucaut, S.; Platts, D. (Heart, Lung & Circulation, 2011)