Maximum phonation time is related to disease severity in male chronic heart failure patients

heart failure patients Kazuhiro P. Izawa ⁎, Satoshi Watanabe , Shinobu Tochimoto , Koichiro Oka , Yuhei Otobe , Shinji Nemoto , Yasuyuki Hirano , Naohiko Osada , Kazuto Omiya , Peter H. Brubaker , Hiroyuki Shimizu g a Graduate School of Health Sciences, Kobe University 7-10-2 Tomogaoka, Suma-ku, Kobe 654-0142, Japan b Department of Rehabilitation Medicine, St. Marianna University School of Medicine Hospital, Kanagawa, Japan c Faculty of Sport Sciences, Waseda University, Saitama, Japan d Department of Physical Therapy, Tokushima Bunri University, Tokushima, Japan e Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kanagawa, Japan f Department of Health and Exercise Science, Wake Forest University, Winston-Salem, NC, USA g Department of Orthopedic Surgery, St. Marianna University School of Medicine, Kanagawa, Japan