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- Title
Detection of exercise periodic breathing using thermal flowmeter in patients with heart failure.
- Authors
Fu, Tieh-Cheng; Lin, Wen-Chen; Wang, Jong-Shyan; Wang, Chao-Hung; Chang, Chun-Tien; Tsai, Cheng-Lun; Lee, Yun-Shien; Lin, Kang-Ping
- Abstract
Exercise periodic breathing (EPB) is associated with exercise intolerance and poor prognosis in patients with heart failure (HF). However, EPB detection during cardiopulmonary exercise test (CPET) is difficult. The present study investigated the use of a wireless monitoring device to record the EPB during CPET and proposed quantization parameter estimates for the EPB. A total of 445 patients with HF were enrolled and underwent exercise tests. The ventilation data from the wearable device were compared with the data obtained during the CPET and were analyzed based on professional opinion and on 2 automated programs (decision tree [DT] and oscillatory pattern methods). The measurement accuracy was greater with the DT method (89 %) than with the oscillatory pattern method (75 %). The cutoffs for EPB recognition using the DT method were (1) an intercept of the regression line passing through the minute ventilation rate vs. the time curve during the recovery phase ≥64.63, and (2) an oscillatory phase duration to total exercise time ratio ≥0.5828. The wearable device was suitable for the assessment of EPB in patients with HF, and our new automated analysis system using the DT method effectively identified the EPB pattern.
- Subjects
HEART failure patients; BREATHING exercises; FLOW meters; CARDIOPULMONARY fitness; PULMONARY function tests; PHYSIOLOGY; PHYSICS equipment; RESPIRATORY disease diagnosis; RHEOLOGY; BREATH tests; MEDICAL thermography; EXERCISE tests; RESEARCH evaluation; HEART failure; RESPIRATORY diseases; PRODUCT design; MEDICAL equipment reliability; RESPIRATORY mechanics; COMPUTER-aided diagnosis; DISEASE complications; EQUIPMENT &; supplies; DIAGNOSIS
- Publication
Medical & Biological Engineering & Computing, 2017, Vol 55, Issue 8, p1189
- ISSN
0140-0118
- Publication type
journal article
- DOI
10.1007/s11517-016-1581-y