Provocation of clinically significant left ventricular outflow tract obstruction by postural change in patients with sigmoid septum
Compliance with ethical standards
Conflict of interest
Yukina Hirata, Hirotsugu Yamada, Kenya Kusunose, Susumu Nishio, Yuta Torii, Yuki Horike and Masataka Sata declare that they have no conflict of interest.
Human rights statements
All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later revisions.