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Full-Text Articles in Biomedical Engineering and Bioengineering
Derivation Of Respiration From Electrocardiogram During Heart Rate Variability Studies, Lingeng Zhao
Derivation Of Respiration From Electrocardiogram During Heart Rate Variability Studies, Lingeng Zhao
Theses
A method was developed to derive the respiration signal from the ECG signal based on the observation that the body-surface ECG is influenced by electrode motion relative to the heart and that fluctuations in the mean cardiac electrical axis accompany respiration. S-Plus programs were developed to calculate the changes in the value of the mean cardiac electrical axis during respiration from a two lead ECG signal and to generate a continuous ECG-derived respiratory signal from the angle information.
Data were taken from 9 healthy subjects during rest, paced breathing and exercise. The respiration was derived from the recorded ECG signals. …
Comparison Of Heart Rate With Chest Wall Vibrations, Kofi M. Arbuah
Comparison Of Heart Rate With Chest Wall Vibrations, Kofi M. Arbuah
Theses
A study is done using a Microwave Interferometer as a computer-assisted non-invasive cardiopulmonary monitor. The Microwave Interferometer is used to record the mechanical vibration of the anterior chest wall by recording the velocity of the displacement of the chest wall. The objective is to first, record mechanical vibrations of the anterior chest wall at different heart rates, and second, attempt to identify the relation between heart rate and chest wall vibration.
The system uses two channels, the first signal produced by the Microwave Interferometer is a record of the velocity of the displacement of the chest wall caused by the …