Apparatus and method for monitoring respiratory function in heart failure patients to determine efficacy of therapy

摘要: The respiratory function of a patient is measured for diagnostic purposes using cardiac rhythm management device. Monitoring the activity initiated after microprocessor in device determines that has been at rest predetermined length time. A respiration related signal derived from either an accelerometer or impedance sensor, depending upon which produces higher signal-to-noise ratio. measuring mechanism low-pass filtered to obtain component. component digitized and sent analysis. can be programmed two modes In first mode, peak-to-peak values over number fixed time interval summed, obtaining minute volume. second method, entire waveform history during stored microprocessor. information then telemetered out physician when interrogated. may review efficacy treatment regimen administered patient.