Bradycardia-dependent rise in the atrial capture threshold early after cardiac pacemaker implantation in patients with sick sinus syndrome☆☆☆

Akira Kimata, MD, Kentaro Yoshida, MD, Noriyuki Takeyasu, MD, Rieko Nakagami, MD, Jun Osada, MD, Takeshi Mitsuhashi, MD, Kazutaka Aonuma, MD, Akihiko Nogami, MD From the Cardiovascular Division, Ibaraki Prefectural Central Hospital, Kasama, Japan, Cardiovascular Division, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan, Department of Cardiology, Saiseikai Utsunomiya Hospital, Utsunomiya, Japan, Department of Cardiology, Yokosuka General Hospital Uwamachi, Yokosuka, Japan, and Department of Cardiovascular Medicine, Saitama Medical Center, Jichi Medical University, Saitama, Japan.