title: Ventricular tachycardia with frequent retrograde P waves.
authors.affiliation: Department of cardiology, Tangdu hospital, Fourth Military Medical University, Xi'an, 710038, People's Republic of China, shangfujun4@163.com.
authors.forename: Fujun
authors.initials: F
authors.lastname: Shang
authors.forename: Jiepin
authors.initials: J
authors.lastname: Wang
authors.forename: Bin
authors.initials: B
authors.lastname: Wang
authors.forename: Zhili
authors.initials: Z
authors.lastname: Li
authors.forename: Yusheng
authors.initials: Y
authors.lastname: Xue