Heart stimulator determining cardiac output, by measuring the systolic pressure, for controlling the stimulation
July 6, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesApparatus and method for adjusting heart/pacer rate relative to right ventricular systolic pressure to obtain a required cardiac output Variable rate pacemaker having upper rate limit governor based on hemodynamic performance Means and apparatus for continuously determining cardiac output in a subject Post-extrasystolic potentiation stimulation with physiologic sensor feedback Method and apparatus for continuous measurement of cardiac output and SVR Pressure sensing pacing lead Patent #: 5324326 InventorAssigneeApplicationNo. 582895 filed on 07/06/2000US Classes:607/23, Blood pressure600/513, Detecting heartbeat electric signal and diverse cardiovascular characteristic600/526, Blood output per beat or time interval607/24Stroke volumeExaminersPrimary: Jastrzab, Jeffrey R.Assistant: Oropeza, Frances P. Attorney, Agent or FirmInternational ClassA61N 001/36Foreign Application Priority Data1998-01-09 SEAbstractA heart stimulator has a circuit for determining cardiac output and for producing a control signal corresponding to the determined cardiac output, and a controller for controlling cardiac stimulation dependent on the control signal. The circuit for determining cardiac output includes a pressure sensor which measures pressure in the right ventricle and which generates an electrical pressure signal corresponding to the measured pressure, and an integrator supplied with the pressure signal which integrates the pressure signal between a start time and stop time to produce an integration result corresponding to the cardiac output, which is used to form the control signal. The pressure signal is bandpass filtered during a systolic phase to identify opening of a valve at the right ventricle as the start time, and to identify closing of the valve as the stop time.Other References
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