Patent ID: 6044298
Filing Date: 2000-03-28
Classification: A61N

Abstract:
Apparatus for optimizing a pacing mode of a cardiac rhythm management device, comprising:(a) an implantable cardiac rhythm management device for producing cardiac stimulating pulses at timed intervals having a plurality of programmable parameters, wherein the implantable device has a plurality of different pacing modes and wherein different parameters are used for different pacing modes;(b) means for applying said pulses to cardiac tissue at least one site to stimulate the heart;(c) means for measuring acoustic noise over predetermined portions of a cardiac cycle during successive cardiac cycles;(d) means for integrating the measured acoustic noise over the predetermined portions of the cardiac cycle;(e) means for varying the programmable parameters of the cardiac rhythm management device in one pacing mode and for varing different programmable parameters in at least one other pacing mode;(f) means for detecting one of a minimum integrated acoustic noise measurement and maximum ratio of integrated acoustic noise as said parameters are varied for use in different pacing modes; and(g) means for setting the pacing mode of the cardiac rhythm management device to the parameters associated with said one of the minimum integrated acoustic noise measurement and maximum ratio of integrated acoustic noise measurements to supply pulses to stimulate the heart.