Key result
Automated subtraction of cardiac activity from the esophageal electromyogram isolates diaphragmatic electrical activity, allowing independent study of respiratory center output.
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The described system allows for the independent study of respiratory center output by isolating diaphragm electrical activity from cardiac signals.
A system is described whereby the integrated electrocardiogram is automatically subtracted from the total integrated electrical activity recorded in the esophagus. By this method, a measure of the electrical activity in the diaphragm is obtained, and the output from the respiratory center can be studied independently of mechanical alterations of chest wall and lungs.
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Mueller et al. (1968) studied this question. Automated subtraction of cardiac activity from the esophageal electromyogram isolates diaphragmatic electrical activity, allowing independent study of respiratory center output.
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