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Electrode Configurations for a Respiratory Impedance Measurement Suitable for Rate Responsive Pacing
Author(s) -
NAPPHOLTZ TIBOR,
VALENTA HARRY,
MALONEY JAMES,
SIMMONS TONY
Publication year - 1986
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.1986.tb06654.x
Subject(s) - medicine , electrode , electrical impedance , reliability (semiconductor) , cardiology , sensitivity (control systems) , biomedical engineering , electronic engineering , electrical engineering , power (physics) , chemistry , physics , quantum mechanics , engineering
A rate responsive cardiac pacemaker will benefit the patient only if the input parameter is a reliable indicator of exercise, Part of the reliability is dependent upon selection of the best physiological parameter and part is dependent upon the measurement technique. Twenty‐six patients have been studied in order to ascertain the best measurement configuration for an intravascular impedance respiratory monitor. Four electrode configurations have been examined at rest and during exercise. The results have been compared using measures of sensitivity and specificity. The ideal configuration requires that a current field be established between the right ventricular blood and the pacemaker case. And, that voltage sensing be done between an electrode in the SVC and the pacemaker case.