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

2014; Elsevier BV; Volume: 174; Issue: 3 Linguagem: Inglês

10.1016/j.ijcard.2014.04.047

1874-1754

Kazuhiro P. Izawa, Satoshi Watanabe, Shinobu Tochimoto, Koichiro Oka, Yuhei Otobe, Shinji Nemoto, Yasuyuki Hirano, Naohiko Osada, Kazuto Omiya, Peter H. Brubaker, Hiroyuki Shimizu,

Respiratory and Cough-Related Research

Maximum phonation time (MPT), which is related to respiratory function, is widely used to evaluate maximum vocal capabilities because its use is non-invasive, quick, and inexpensive ( 1 Speyer R. Bogaardt H.C. Passos V.L. et al. Maximum phonation time: variability and reliability. J Voice. 2010; 24: 281-284 Abstract Full Text Full Text PDF PubMed Scopus (81) Google Scholar , 2 Izawa K.P. Watanabe S. Tochimoto S. et al. Relation between maximum phonation time and exercise capacity in chronic heart failure patients. Eur J Phys Rehabil Med. 2012; 48: 593-599 PubMed Google Scholar ). Patients with chronic heart failure (CHF) have lower peak oxygen uptake ( V • O 2 ) values compared with apparently healthy individuals ( 2 Izawa K.P. Watanabe S. Tochimoto S. et al. Relation between maximum phonation time and exercise capacity in chronic heart failure patients. Eur J Phys Rehabil Med. 2012; 48: 593-599 PubMed Google Scholar , 3 Izawa K.P. Watanabe S. Yokoyama H. et al. Muscle strength in relation to disease severity in patients with congestive heart failure. Am J Phys Med Rehabil. 2007; 86: 893-900 Crossref PubMed Scopus (28) Google Scholar ). We previously found that MPT correlates positively with peak V • O 2 in CHF patients, and that peak V • O 2 indices decrease with increases in New York Heart Association (NYHA) functional class ( [2] Izawa K.P. Watanabe S. Tochimoto S. et al. Relation between maximum phonation time and exercise capacity in chronic heart failure patients. Eur J Phys Rehabil Med. 2012; 48: 593-599 PubMed Google Scholar ). The present cross-sectional study aimed to determine a relation between the MPT index and disease severity in CHF patients. We selected 101 consecutive male outpatients (mean age, 54.5 years) with stable CHF who visited our university hospital for first-time evaluation of MPT and peak V • O 2 by cycle ergometer. Those classified as NYHA functional class IV, and those with neurological, peripheral vascular, orthopedic, or pulmonary disease, cancer, cirrhosis of the liver, nephrotic syndrome, advanced renal disease, or who were on dialysis were excluded. We evaluated participant characteristics including age, body mass index, left ventricular ejection fraction (LVEF), etiology, and medications. A cardiologist assessed LVEF as the index of cardiac function by echocardiography. NYHA classification was determined in all patients by an independent physician.