Pacing system and method for physiological stimulation of the heart utilizing Doppler means
First Claim
1. A cardiac pacemaker/treatment system having a generator device and a lead means, said generator device having a controllable pulse generator for generating pulses, input means for receiving input signals representative of at least cardiac conditions, and logic means for analyzing said input signals and controlling said pulse generator to deliver generator pulses in response to said analyzing, said lead means having a proximal end connected to said generator device and a distal end portion adapted to be positioned in a patient'"'"'s ventricle for delivering generated pulses to said ventricle and for sensing heartbeats and delivering input signals representative of said heartbeats to said input means,characterized by said lead means having atrial sensor means adapted to be positioned in the patient'"'"'s atrium without any contact with the atrial wall for sensing atrial wall movement and for generating atrial input signals representative of the velocity and direction of said wall movement, and said logic means having atrial signal means for analyzing said atrial input signals and controlling the delivery of pulses to the ventricle as a function of said analysis.
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Accused Products
Abstract
A cardiac pacemaker and method of operation of such pacemaker is disclosed comprising a single lead having conventional ventricular pacing and sensing electrode means as well as atrial sensors adapted to be positioned in the patient'"'"'s atrim without any contact with the atrial wall, for sensing atrial wall movement and for generating information signals representative of the atrial wall movement. The free-floating atrial sensor is utilized in providing information for making a determination of a number of cardiac conditions, including analysis of direction of P waves to determine whether sensed signals are anterograde or retrograde.
102 Citations
12 Claims
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1. A cardiac pacemaker/treatment system having a generator device and a lead means, said generator device having a controllable pulse generator for generating pulses, input means for receiving input signals representative of at least cardiac conditions, and logic means for analyzing said input signals and controlling said pulse generator to deliver generator pulses in response to said analyzing, said lead means having a proximal end connected to said generator device and a distal end portion adapted to be positioned in a patient'"'"'s ventricle for delivering generated pulses to said ventricle and for sensing heartbeats and delivering input signals representative of said heartbeats to said input means,
characterized by said lead means having atrial sensor means adapted to be positioned in the patient'"'"'s atrium without any contact with the atrial wall for sensing atrial wall movement and for generating atrial input signals representative of the velocity and direction of said wall movement, and said logic means having atrial signal means for analyzing said atrial input signals and controlling the delivery of pulses to the ventricle as a function of said analysis.
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12. A pacing system comprising a pacemaker generator and a single lead connected thereto, said lead having ventricular electrode means for sensing and pacing in patient'"'"'s ventricle and atrial sensing means for sensing direction of wall movement of the patient'"'"'s atrium and for generating output signals indicative thereof, said pacemaker generator having means for determining the presence of retrograde P waves solely as a function of output signals.
Specification