**Pulmonary Venous Flow Pattern and Atrial Fibrillation: Fact and Controversy**

Toru Maruyama1, Yousuke Kokawa2, Hisataka Nakamura2, Mitsuhiro Fukata2, Shioto Yasuda2, Keita Odashiro2 and Koichi Akashi2 *1Institute of Health Science and 2Department of Medicine, Kyushu University, Fukuoka Japan* 
