title: Transfer function analysis of heart rate variability correlated with gastric myoelectrical activity using a liquid nutritional meal compared to water: are they different?
abstract: We aimed to investigate difference in the effects of water and a liquid nutritional meal on the parasympathetic and gastric myoelectrical activities. The study was a repeated-measures design in which each subject was presented with 500 ml of water and a liquid nutritional meal (Ensure) on two separate and random sessions. The electrogastrography (EGG) and electrocardiogram were simultaneously recorded in 16 healthy subjects. There were no significant changes in the EGG-3 cycle per minute (cpm) power, any HRV variable, or the transfer function magnitude after Ensure intake. Water ingestion resulted in a significant increase in both the EGG-3 cpm power and the transfer magnitude compared to Ensure intake (P < 0.05). The effects of water and Ensure on the parasympathetic and gastric electric activities are different, in which the latter is less likely to provoke an autonomic response after gastric stimulation.
authors.affiliation: Department of Medicine, Buddhist Tzu Chi Hospital and University, School of Medicine, Hualien 970, Taiwan, ROC.
authors.forename: Chien-Lin
authors.initials: CL
authors.lastname: Chen
authors.forename: Cheryl C H
authors.initials: CC
authors.lastname: Yang
authors.forename: Terry B J
authors.initials: TB
authors.lastname: Kuo
mesh_terms: D000328:Adult; D000465:Algorithms; D003627:Data Interpretation, Statistical; D004562:Electrocardiography; D005526:Food, Formulated; D006321:Heart / Q000294:innervation / Q000502:physiology; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008297:Male; D016065:Myoelectric Complex, Migrating / Q000502:physiology*; D010275:Parasympathetic Nervous System / Q000502:physiology; D015656:Respiratory Mechanics / Q000502:physiology; D013270:Stomach / Q000294:innervation / Q000502:physiology*; D014867:Water
chemical_list: D014867:Water