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Extraction of respiratory signals from the electrocardiogram and photoplethysmogram: technical and physiological determinants.
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Abstract
Breathing rate (BR) can be estimated by extracting respiratory signals from the electrocardiogram (ECG) or photoplethysmogram (PPG). The extracted respiratory signals may be influenced by several technical and physiological factors. In this study, our aim was to determine how technical and physiological factors influence the quality of respiratory signals.