Resources Contact Us Home
Heart pacemaker

Image Number 5 for United States Patent #5088491.

A cardiac pacemaker for implanting in a patient includes a device for applying stimulating pulses to the heart of the patient at a rate determined by a pacing parameter; a device for detecting a first physiological parameter which is correlated with physical exertion of the patient and producing a first output signal representative of the first physiological parameter; a circuitry device receiving the first output signal for varying the pacing parameter as a function of the first output signal received as an input variable; and the circuitry device being a closed-loop control device which receives first output signal from the device for detecting the first physiological parameter, for determining one of (a) the product of the heart rate and the stroke volume and (b) the product of the heart rate and a single variable representative of the stroke volume as the cardiac output, to correspond to changes in the first output signal which represents a standard for the current physical exertion of the patient, for varying the pacing parameter.

  Recently Added Patents
Near-field optical disk having surface plasmon amplification by stimulated emission of radiation
Reduced plating ignitron
Image processing apparatus and method having defective pixel detection and correction ability
Signal generator
Fabrication method of semiconductor device and fabrication method of dynamic threshold transistor
Image forming apparatus with static elimination
Apparatus and method for foreground detection
  Randomly Featured Patents
RF ablation system and method having automatic temperature control
Apparatus and method for fabricating backside mosaic of photoconductive infrared detectors
Electric motor having a field assembly with slot insulation
Formation of devices by epitaxial layer overgrowth
Lower unit repair fixture
System and method of notifying unpublished subscribers of request for contact information
Food or beverage container or container panel
Instrument panel structure
Method for making a silicon dioxide layer on a silicon substrate by pure water anodization followed by rapid thermal densification
Garment with convertible collar