Text and Data Mining valid from 2019-06-15
Received: 11 March 2019
Accepted: 31 May 2019
First Online: 15 June 2019
Compliance with ethical standards
: Dr. Hirayama A and Hiro T are employed by the Department of Advanced Cardiovascular Imaging, Nihon University School of Medicine; which is endowed by Boston Scientific Corporation Japan, Abbott Medical Japan Co., Ltd and St. Jude Medical Japan Co., Ltd.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study and its protocols were approved by the Institutional Review Board of Nihon University Itabashi Hospital. This article does not contain any studies with animals performed by any of the authors.