Initial experience using a forward directed, high-intensity focused ultrasound balloon catheter for pulmonary vein antrum isolation in patients with atrial fibrillation

Hiroshi Nakagawa, Matthias Antz, Tom Wong, Boris Schmidt, Sabine Ernst, Feifan Ouyang, Thomas Vogtmann, Richard Wu, Katsuaki Yokoyama, Deborah Lockwood, Sunny S. Po, Karen J. Beckman, D. Wyn Davies, Karl Heinz Kuck, Warren M. Jackman