Characteristics of patients with atrial flutter and spontaneous 1:1 atrioventricular conduction with and without anti-arrhythmic drug treatment

Kanako Ito-Hagiwara (MD, PhD)^a, Yu-ki Iwasaki (MD, PhD)^a,*, Yuhi Fujimoto (MD, PhD)^a, Eiichiro Oka (MD, PhD)^a, Hiroshi Hayashi (MD, PhD)^a, Teppei Yamamoto (MD, PhD)^a, Kenji Yodogawa (MD, PhD)^a, Meiso Hayashi (MD, PhD)^a, Yasushi Miyauchi (MD, PhD)^b, Wataru Shimizu (MD, PhD)^a

^aDepartment of Cardiovascular Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, 113-8603, Tokyo, Japan

^bDepartment of Cardiovascular Medicine, Nippon Medical School Chiba Hokusoh Hospital, 1715 Kamagari, Inzai-shi, 270-1694, Chiba, Japan

Kanako Ito-Hagiwara and Yu-ki Iwasaki contributed equally to this paper.